Buy Hot X: Algebra Exposed here

Author: Danica McKellar
Price: Approx. $15.00 (Amazon.com - Exact price available at Buy link)
Product type: Book (Hardcover)
Preview: Author discussing her book

Description: New York Times bestselling author Danica McKellar tackles the toughest math class yet: Algebra!

With Math Doesn't Suck and Kiss My Math, actress and math genius Danica McKellar shattered the "math nerd" stereotype by showing students how to ace middle school math and pre-algebra in her unique, just-us-girls style.

Sizzling with Danica's trademark sass and style, Hot X: Algebra Exposed puts math-phobic students at ease, showing anyone how to become confident and totally "get" topics like square roots, polynomials, quadratic equations, word problems, and more. Each chapter features:

• Easy to follow, step-by-step instruction
• Time-saving tips and tricks for homework and tests
• Illuminating practice problems with detailed solutions
• Real-world examples that teens can relate to!
• True stories from Danica's own life as a math student and actress

• http://www.amazon.com/Hot-Algebra-Exposed-Danica-McKellar/dp/1594630704?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Danica McKellar
• Price: Approx. $15.00 (Amazon.com - Exact price available at Buy link)
• Product type: Book (Hardcover)
• Preview: Author discussing her book
• Description: New York Times bestselling author Danica McKellar tackles the toughest math class yet: Algebra!
  
  Sizzling with Danica's trademark sass and style, Hot X: Algebra Exposed puts math-phobic students at ease, showing anyone how to become confident and totally "get" topics like square roots, polynomials (Learn more...)

Buy Kiss My Math here

Author: Danica McKellar
Price: $9.98 (Amazon.com)
Product type: Book (Hardcover)
Preview: Google Preview, Author discussing her book

Description: From the author of the runaway bestseller Math Doesn’t Suck, the next step in the math curriculum-- pre-Algebra.

Last year, actress and math genius Danica McKellar made waves nationwide, challenging the “math nerd” stereotype—and giving girls the tools to ace tests and homework in her unique just-us-girls style. Now, in Kiss My Math, McKellar empowers a new crop of girls—7th to 9th graders—taking on the next level of mathematics: pre-Algebra.

Stepping up not only the math, but also the sass and style, Kiss My Math will help math-phobic teenagers everywhere chill out about math, and finally “get” negative numbers, variables, absolute values, exponents, and more. Each chapter features:

• Step-by-step instruction
• Time-saving tips and tricks
• Illuminating practice problems with detailed solutions
• Real-world examples
• True stories from Danica’s own life as a student and actress

• http://www.amazon.com/Kiss-My-Math-Showing-Pre-Algebra/dp/B004E3XDE4?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Danica McKellar/li>
  
• Price: $9.98 (Amazon.com)




• Product type: Book (Hardcover)




• Preview: Google Preview, Author discussing her book




• Description: From the author of the runaway bestseller Math Doesn’t Suck, the next step in the math curriculum-- pre-Algebra. (Learn more...)

Buy Math Doesn't Suck (Kindle) here

Author: Danica McKellar
Price: $12.99 (Amazon.com)
Product type: Book (Softcover)
Preview: Google Preview, Author discussing her book

Description: Straight from Hollywood, this one-of-a-kind guide is guaranteed to make middle school math a breeze!

In Math Doesn't Suck, internationally known actress and bonafide math genius Danica McKellar — called a "math superstar" by The New York Times — rips the lid off the myth that math "sucks," helping to show that math can be easy, relevant, and even glamorous—while providing the tools needed to ace the next big math test! With Danica as a personal tutor and coach, even the most frustrated student will finally "get" fractions, decimals, rates, ratios, proportions, "solving for x," and more — the very concepts that, if not fully understood in middle school, have been proven to cause continued problems throughout high school and beyond. Each chapter also features:

• Easy to follow, step-by-step instruction
• Time-saving tips and tricks for homework and tests
• Illuminating practice problems with detailed solutions
• Real-world examples—from how understanding percents can make you a savvier shopper to how understanding proportions can make you a better chef!

• http://www.amazon.com/Math-Doesnt-Suck-Breaking-ebook/dp/B000URWYPC?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Danica McKellar
• Price: $12.99 (Amazon.com)
• Product type: Book (Softcover)
• Preview: Google Preview, Author discussing her book
• Description: Straight from Hollywood, this one-of-a-kind guide is guaranteed to make middle school math a breeze!
  
  In Math Doesn't Suck, internationally known actress and bonafide math genius Danica McKellar rips the lid off the myth that math "sucks," helping to show that math can be easy, relevant, and even glamorous (Learn more...)

Buy Math Doesn't Suck (Book) here

Author: Danica McKellar
Price: Approx. $9.00 (Amazon.com - Exact price available at Buy link)
Product type: Book (Softcover)
Preview: Google Preview, Author discussing her book

Description: Straight from Hollywood, this one-of-a-kind guide is guaranteed to make middle school math a breeze!

In Math Doesn't Suck, internationally known actress and bonafide math genius Danica McKellar — called a "math superstar" by The New York Times — rips the lid off the myth that math "sucks," helping to show that math can be easy, relevant, and even glamorous—while providing the tools needed to ace the next big math test! With Danica as a personal tutor and coach, even the most frustrated student will finally "get" fractions, decimals, rates, ratios, proportions, "solving for x," and more — the very concepts that, if not fully understood in middle school, have been proven to cause continued problems throughout high school and beyond. Each chapter also features:

• Easy to follow, step-by-step instruction
• Time-saving tips and tricks for homework and tests
• Illuminating practice problems with detailed solutions
• Real-world examples—from how understanding percents can make you a savvier shopper to how understanding proportions can make you a better chef!

• http://www.amazon.com/Math-Doesnt-Suck-Survive-Breaking/dp/0452289491?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Danica McKellar
• Price: Approx. $9.00 (Amazon.com - Exact price available at Buy link)
• Product type: Book (Softcover)
• Preview: Google Preview, Author discussing her book
• Description: Straight from Hollywood, this one-of-a-kind guide is guaranteed to make middle school math a breeze!
  
  In Math Doesn't Suck, internationally known actress and bonafide math genius Danica McKellar rips the lid off the myth that math "sucks," helping to show that math can be easy, relevant, and even glamorous (Learn more...)

Buy Ear-Marked here

Author: Werner Miller
Price: $25.00 (Cafepress.com)
Product type: Book (Softcover)
Preview: View Werner Miller's creations here on Grey Matters (Opens in new window)

Description: Mathematics meets magic in this wonderful collection by Werner Miller!

For years, Werner Miller's delightful thinking has appeared in magic magazines all over the world. Now, Werner's brilliant mathematical magic pieces are available in his first English-language volume!

Werner's "off the wall and outside of the box" thinking has captivated magicians around the world and now you can see why!

But you can see for yourself some of Werner's creative approach to math and magic: his work has long been featured right here at Grey Matters!

From the introduction: "Werner Miller plays with math and magic and does so with way too much creativity for a mortal man."

Now, in Ear-Marked, you can see and enjoy over 50 examples of Werner's "mathe-magical" creations and begin dropping jaws with the impressive and entertaining pieces inside!

• http://www.tkqlhce.com/click-5243238-10463747?url=http%3A%2F%2Fwww.cafepress.com%2Fthevisionsgroup.56589122
• Author: Werner Miller
• Price: $25.00 (Cafepress.com)
• Product type: Book (Softcover)
• Preview: View Werner Miller's creations here on Grey Matters (Opens in new window)
• Description: Mathematics meets magic in this wonderful collection by Werner Miller!
  
  For years, Werner Miller's delightful thinking has appeared in magic magazines all over the world. Now, Werner's brilliant mathematical magic pieces are available in his first English-language volume! (Learn more...)

Buy ThinkFun Fifteen Puzzle here

Manufacturer: ThinkFun
Price: Approx. $8.00 (Amazon.com - Exact price available at Buy link)
Product type: Puzzle
Preview: Try this puzzle online

Description: Fifteen Puzzles are one of the world’s most recognized and popular puzzles. It bridges generations.

The Fifteen Puzzle is a classic numerical nightmare, originally introduced in 1880. Binary Arts has recreated it in smooth, polished metal and decorative enamel, just as it appeared at the height of its popularity during the 1930s. Scramble the 15 numbered tiles in the tray, then try to slide them into correct numerical order. Enclosed booklet features over 30 additional challenges; handy leatherette carry bag included.

Features Stainless steel construction for smooth operation and durability, handy travel case and over 30 challenges included in booklet. The perfect pocket-size travel game.

Try the 15 puzzle for yourself right here! To move any number tile into the empty space, simply click any square above, below, to the left of, or to the right of the empty space. The Shuffle button will mix the tile arrangement.

• http://www.amazon.com/Think-Fun-4900-ThinkFun-Fifteen/dp/B00005J36F?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Manufacturer: ThinkFun
• Price: Approx. $8.00 (Amazon.com - Exact price available at Buy link)
• Product type: Puzzle
• Preview: Try this puzzle online
• Description: Fifteen Puzzles are one of the world’s most recognized and popular puzzles. It bridges generations.
  
  The Fifteen Puzzle is a classic numerical nightmare, originally introduced in 1880. Binary Arts has recreated it in smooth, polished metal and decorative enamel, just as it appeared at the height of its popularity during the 1930s. (Learn more...)

Buy Rubik's Cube here

Manufacturer: Winning Moves
Price: Approx. $12.00 (Amazon.com - Exact price available at Buy link)
Product type: Puzzle
Preview: Try this puzzle online, View the original 1980s Rubik's Cube ad

Description: The date is 1974. The place is Budapest, Hungary. Erno Rubik, an admirer of geometry and 3-D forms creates the world's most perfect -- and addictive -- puzzle. More than three decades later the Rubik's cube is still one of the best selling brainteasers. Whether it was full size or the smaller keychain version almost every child had this puzzle by in 1980 when it found worldwide success. Elementary school kids were seen solving it with their feet on "That's Incredible!", conspiracy theorists believed it was an Eastern bloc tactic to distract American youth from getting an education, and Cubaholics Anonymous was formally established to help cure the compulsive need to solve it.

For all of the hullabaloo, the Rubik’s Cube actually has a pretty straightforward premise. The faces of the cube are covered by nine stickers in six solid colors (one for each 2.25" side); when the puzzle is solved, each face is one solid color. Then you realize as you turn the rows and columns and see all the colors flash by that there are 43 quintillion possible pattern combinations (that’s 43 million millions), but just one right one. Maybe Cubaholics Anonymous wasn’t such a bad idea after all….

This Rubik’s Cube has reflective red, white, blue, yellow, green, and orange colored stickers with an official twenty-fifth anniversary sticker in the center white square. The cube is packaged in a clear hexagon box and includes a black display stand. There is also a solutions hint and game suggestion book, just in case.

Try the 15 puzzle for yourself right here! The big arrows rotate the cube on its axis, and the smaller arrows turn the corresponding parts of the Rubik's Cube. Clicking on the cube in the upper right corner will scramble or solve the Rubik's Cube, depending on its current state.


Here's the original Rubik's Cube ad from the 1980s:

• http://www.amazon.com/Winning-Moves-5025-Rubiks-Cube/dp/B00081RYNC?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Manufacturer: Winning Moves
• Price: Approx. $12.00 (Amazon.com - Exact price available at Buy link)
• Product type: Puzzle
• Preview: Try this puzzle online, View the original 1980s Rubik's Cube ad
• Description: For all of the hullabaloo, the Rubik’s Cube actually has a pretty straightforward premise. The faces of the cube are covered by nine stickers in six solid colors (one for each 2.25" side); when the puzzle is solved, each face is one solid color. Then you realize as you turn the rows and columns and see all the colors flash by that there are 43 quintillion possible pattern combinations (that’s 43 million millions), but just one right one. (Learn more...)

Buy Moonwalking with Einstein here

Author: Joshua Foer
Price: $12.99 (Amazon.com)
Product type: eBook (Kindle - Hardcover version also available)
Previews: Google Preview, Author discussing his book

Description: Foer's unlikely journey from chronically forgetful science journalist to U.S. Memory Champion frames a revelatory exploration of the vast, hidden impact of memory on every aspect of our lives.

On average, people squander forty days annually compensating for things they've forgotten. Joshua Foer used to be one of those people. But after a year of memory training, he found himself in the finals of the U.S. Memory Championship. Even more important, Foer found a vital truth we too often forget: In every way that matters, we are the sum of our memories.

Moonwalking with Einstein draws on cutting-edge research, a surprising cultural history of memory, and venerable tricks of the mentalist's trade to transform our understanding of human remembering. Under the tutelage of top "mental athletes," he learns ancient techniques once employed by Cicero to memorize his speeches and by Medieval scholars to memorize entire books. Using methods that have been largely forgotten, Foer discovers that we can all dramatically improve our memories.

Immersing himself obsessively in a quirky subculture of competitive memorizers, Foer learns to apply techniques that call on imagination as much as determination-showing that memorization can be anything but rote. From the PAO system, which converts numbers into lurid images, to the memory palace, in which memories are stored in the rooms of imaginary structures, Foer's experience shows that the World Memory Championships are less a test of memory than of perseverance and creativity.

Foer takes his inquiry well beyond the arena of mental athletes-across the country and deep into his own mind. In San Diego, he meets an affable old man with one of the most severe case of amnesia on record, where he learns that memory is at once more elusive and more reliable than we might think. In Salt Lake City, he swaps secrets with a savant who claims to have memorized more than nine thousand books. At a high school in the South Bronx, he finds a history teacher using twenty- five-hundred-year-old memory techniques to give his students an edge in the state Regents exam.

At a time when electronic devices have all but rendered our individual memories obsolete, Foer's bid to resurrect the forgotten art of remembering becomes an urgent quest. Moonwalking with Einstein brings Joshua Foer to the apex of the U.S. Memory Championship and readers to a profound appreciation of a gift we all possess but that too often slips our minds.

Here's author Joshua Foer discussing the story behind his book, Moonwalking with Einstein:



Google Preview:

• http://www.amazon.com/Moonwalking-Einstein-Remembering-Everything-ebook/dp/B004H4XI5O?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Joshua Foer
• Price: $15.05 (Amazon.com)
• Product type: eBook (Kindle)
• Previews: Google Preview, Author discussing his book
• Description: Foer's unlikely journey from chronically forgetful science journalist to U.S. Memory Champion frames a revelatory exploration of the vast, hidden impact of memory on every aspect of our lives. (Learn more...)

Buy Moonwalking with Einstein here

Author: Joshua Foer
Price: Approx. $15.00 (Amazon.com - Exact price available at Buy link)
Product type: Book (Hardcover - eBook version also available)
Previews: Google Preview, Author discussing his book

Description: Foer's unlikely journey from chronically forgetful science journalist to U.S. Memory Champion frames a revelatory exploration of the vast, hidden impact of memory on every aspect of our lives.

On average, people squander forty days annually compensating for things they've forgotten. Joshua Foer used to be one of those people. But after a year of memory training, he found himself in the finals of the U.S. Memory Championship. Even more important, Foer found a vital truth we too often forget: In every way that matters, we are the sum of our memories.

Moonwalking with Einstein draws on cutting-edge research, a surprising cultural history of memory, and venerable tricks of the mentalist's trade to transform our understanding of human remembering. Under the tutelage of top "mental athletes," he learns ancient techniques once employed by Cicero to memorize his speeches and by Medieval scholars to memorize entire books. Using methods that have been largely forgotten, Foer discovers that we can all dramatically improve our memories.

Immersing himself obsessively in a quirky subculture of competitive memorizers, Foer learns to apply techniques that call on imagination as much as determination-showing that memorization can be anything but rote. From the PAO system, which converts numbers into lurid images, to the memory palace, in which memories are stored in the rooms of imaginary structures, Foer's experience shows that the World Memory Championships are less a test of memory than of perseverance and creativity.

Foer takes his inquiry well beyond the arena of mental athletes-across the country and deep into his own mind. In San Diego, he meets an affable old man with one of the most severe case of amnesia on record, where he learns that memory is at once more elusive and more reliable than we might think. In Salt Lake City, he swaps secrets with a savant who claims to have memorized more than nine thousand books. At a high school in the South Bronx, he finds a history teacher using twenty- five-hundred-year-old memory techniques to give his students an edge in the state Regents exam.

At a time when electronic devices have all but rendered our individual memories obsolete, Foer's bid to resurrect the forgotten art of remembering becomes an urgent quest. Moonwalking with Einstein brings Joshua Foer to the apex of the U.S. Memory Championship and readers to a profound appreciation of a gift we all possess but that too often slips our minds.

Here's author Joshua Foer discussing the story behind his book, Moonwalking with Einstein:



Google Preview:

• http://www.amazon.com/Moonwalking-Einstein-Science-Remembering-Everything/dp/159420229X?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Joshua Foer
• Price: Approx. $15.00 (Amazon.com - Exact price available at Buy link)
• Product type: Book (Hardcover)
• Previews: Google Preview, Author discussing his book
• Description: Foer's unlikely journey from chronically forgetful science journalist to U.S. Memory Champion frames a revelatory exploration of the vast, hidden impact of memory on every aspect of our lives. (Learn more...)

Buy Think of a Link here

Author: Andy Salmon
Price: Approx. $11.00 (Amazon.com - Exact price available at Buy link)
Product type: Book (Hardcover)
Preview: Author introducing the Think-A-Link concept

Description: Offers a way to remember things such as dates, names and facts!

This book is by Andy Salmon, the creator of Thinkalink.co.uk, which was launched in May '08, is a fun and easy way to remember things employing the underused learning-tool, 'linking'.

The site is a meeting-place, online, to learn any fact you care to mention whether it be the spelling of Diarrhoea or what the jaw bone is called. For example:

• The capital of Brazil is Brasilia ... Because they're brasiliant at football;
• Russia is the world's biggest country ... If you Russia lot, you'll get there first.

• http://www.amazon.com/Think-Link-Remember-Absolutely-Everything/dp/1407116487?ie=UTF8&tag=greymatt-20&link_code=btl&camp=213689&creative=392969
• Author: Andy Salmon
• Price: Approx. $11.00 (Amazon.com - Exact price available at Buy link)
• Product type: Book (Hardcover)
• Preview: Author introducing the Think-A-Link concept
• Description: Offers a way to remember things such as dates, names and facts!
  
  Many of the 'links' are aided by a 'bonkers' cartoon by Clive Goddard as a lot of people are visual learners. (Learn more...)

Buy Penny Star Puzzle Framed Tile here

Designed by: Grey Matters
Price: $10.99 (CafePress.com)
Product type: Framed Tile
Preview: Try this puzzle online, Video with solution hint

Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.

Why is this so tough? Classic and challenging!

The design itself states the simple nature of the challenge:

• 1: Put a penny on any EMPTY circle.
• 2: Slide on linked line to another EMPTY circle.
• Goal: Place 7 pennies in the circles

It's not tough to place 5 or 6 coins in this manner, but placing 7 in this manner is quite the brain teaser.

Once you learn how to master it, this classic 7 coin puzzle takes on some added charm. Not only can you challenge your friends to do it, you can even show them the solution quickly and they still won't be able to solve it!

You can hang it on the wall, and when someone asks you about it, challenge them with the puzzle! The center is faux wood texture on ceramic tile. (Texture: Patrick Hoesly)

Set off our decorative ceramic tile in its own stylish stained wooden frame -- the perfect way to complete a decorative gift or keepsake. Rounded edges and quality construction make this Framed Tile the ultimate wall accent.

• Frame measures 6" X 6" x 0.5" with 4.25" X 4.25" tile
• Constructed of stained Cherrywood
• Two holes for wall mounting

Try the puzzle for yourself right here! Start by clicking on any empty spot to place a penny there, and then clicking on a wooden target to slide the penny there.

Restart
This board can also be used to play the game Star Nim.

How do you actually solve it? The dollar bill puzzle in the following Scam School video works on the same basis as the Penny Star Puzzle, so perhaps it may provide a clue:

• http://www.cafepress.com/greymattersstore.608402509
• Designed by: Grey Matters
• Price: $10.99 (CafePress.com)
• Product type: Framed Tile
• Preview: Try this puzzle online, Video with solution hint
• Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.
  
  Why is this so tough? Classic and challenging! (Learn more...)

Buy Penny Star Puzzle Keepsake Box here

Designed by: Grey Matters
Price: $22.99 (CafePress.com)
Product type: Keepsake Box
Preview: Try this puzzle online, Video with solution hint

Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.

Why is this so tough? Classic and challenging!

The design itself states the simple nature of the challenge:

• 1: Put a penny on any EMPTY circle.
• 2: Slide on linked line to another EMPTY circle.
• Goal: Place 7 pennies in the circles

It's not tough to place 5 or 6 coins in this manner, but placing 7 in this manner is quite the brain teaser.

Once you learn how to master it, this classic 7 coin puzzle takes on some added charm. Not only can you challenge your friends to do it, you can even show them the solution quickly and they still won't be able to solve it!

Both the keepsake box and the puzzle itself are meant to stand the test of time. The center is faux wood texture on ceramic tile. (Texture: Patrick Hoesly)

Perfect for stylishly storing jewelry and mementos, this hardwood box showcases a ceramic tile. Spring-loaded hinged lid stays open without tipping the box over and snaps closed securely.

• Made of solid hardwood with high-gloss lacquer finish
• Interior is fully lined in velvet; bottom is covered with felt
• Measures 5.5" x 5.5" x 2.25" with a 4.25" x 4.25" ceramic tile

Try the puzzle for yourself right here! Start by clicking on any empty spot to place a penny there, and then clicking on a wooden target to slide the penny there.

Restart
This board can also be used to play the game Star Nim.

How do you actually solve it? The dollar bill puzzle in the following Scam School video works on the same basis as the Penny Star Puzzle, so perhaps it may provide a clue:

• http://www.cafepress.com/greymattersstore.608402510
• Designed by: Grey Matters
• Price: $22.99 (CafePress.com)
• Product type: Keepsake Box
• Preview: Try this puzzle online, Video with solution hint
• Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.
  
  Why is this so tough? Classic and challenging! (Learn more...)

Buy Penny Star Puzzle Tile Coaster here

Designed by: Grey Matters
Price: $6.99 (CafePress.com)
Product type: Tile Coaster
Preview: Try this puzzle online, Video with solution hint

Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.

Why is this so tough? Classic and challenging!

The design itself states the simple nature of the challenge:

• 1: Put a penny on any EMPTY circle.
• 2: Slide on linked line to another EMPTY circle.
• Goal: Place 7 pennies in the circles

It's not tough to place 5 or 6 coins in this manner, but placing 7 in this manner is quite the brain teaser.

Once you learn how to master it, this classic 7 coin puzzle takes on some added charm. Not only can you challenge your friends to do it, you can even show them the solution quickly and they still won't be able to solve it!

You could use this tile coaster during a party, and have everyone race to see who can do it first! This ceramic tile features a gorgeous faux wood texture. (Texture: Patrick Hoesly)

Liven up any room or party with our fun, hip tile coasters, measuring 4.25" x 4.25" and 1/6-inch thick. Images are applied with a polyester resin that accepts dye as part of the coating. Four felt pads protect your furniture from scratches. Dishwasher safe. Not for use with abrasive cups and mugs.

Try the puzzle for yourself right here! Start by clicking on any empty spot to place a penny there, and then clicking on a wooden target to slide the penny there.

Restart
This board can also be used to play the game Star Nim.

How do you actually solve it? The dollar bill puzzle in the following Scam School video works on the same basis as the Penny Star Puzzle, so perhaps it may provide a clue:

• http://www.cafepress.com/greymattersstore.608402511
• Designed by: Grey Matters
• Price: $6.99 (CafePress.com)
• Product type: Tile Coaster
• Preview: Try this puzzle online, Video with solution hint
• Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.
  
  Why is this so tough? Classic and challenging! (Learn more...)

Buy Penny Star Puzzle Mousepad here

Designed by: Grey Matters
Price: $12.99 (CafePress.com)
Product type: Mousepad
Preview: Try this puzzle online, Video with solution hint

Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.

Why is this so tough? Classic and challenging!

The design itself states the simple nature of the challenge:

• 1: Put a penny on any EMPTY circle.
• 2: Slide on linked line to another EMPTY circle.
• Goal: Place 7 pennies in the circles

It's not tough to place 5 or 6 coins in this manner, but placing 7 in this manner is quite the brain teaser.

Once you learn how to master it, this classic 7 coin puzzle takes on some added charm. Not only can you challenge your friends to do it, you can even show them the solution quickly and they still won't be able to solve it!

With this mousepad, you can challenge your wits even when the computer is off! Wood texture gives an elegant look to this mousepad. (Texture: Patrick Hoesly)

Keep your mouse rolling in style on our durable cloth top mousepad. A great gift for geeks, gamers, or anyone with a computer. Rubber backing prevents the mousepad from sliding. Machine washable.

Try the puzzle for yourself right here! Start by clicking on any empty spot to place a penny there, and then clicking on a wooden target to slide the penny there.

Restart
This board can also be used to play the game Star Nim.

How do you actually solve it? The dollar bill puzzle in the following Scam School video works on the same basis as the Penny Star Puzzle, so perhaps it may provide a clue:

• http://www.cafepress.com/greymattersstore.608402508
• Designed by: Grey Matters
• Price: $12.99 (CafePress.com)
• Product type: Mousepad
• Preview: Try this puzzle online, Video with solution hint
• Description: It seems simple enough: Put a penny on any empty circle, slide it to another empty circle, and do this 7 times.
  
  Why is this so tough? Classic and challenging! (Learn more...)

Buy Back Scratch Shirts here

Design by: Grey Matters
Price: $19.99 and up (CafePress.com)
Product type: Clothing (Men's & Women's Tops, Assorted Styles)

Description: Ever have a back itch and couldn't tell your partner exactly where?

With this top's grid on the back, along with the guide on the front, you can direct them exactly! Fun AND functional!

These shirts are available in many styles and colors for men and women.

Available styles currently include:

Women's:
Women's Tank Top
Women's T-Shirt
Women's Light T-Shirt (Light Blue, Light Yellow, and Light Pink)
Women's Cap Sleeve T-Shirt (Black/White, Red/White, and Brown/White)
Women's V-Neck T-Shirt
Jr. Raglan (Black/White, Pink/White, and Baby Blue/White)
Jr. Ringer T-Shirt (Pink/Salmon, Yellow/Gold, and Mint/Avocado)
Jr. Jersey T-Shirt (White and Pink)
Organic Women's Fitted T-Shirt
Women's Long Sleeve T-Shirt
Organic Women's T-Shirt
Maternity T-Shirt (White and Pink) - Very helpful for the mother-to-be!
Women's Plus Size Scoop Neck T-Shirt
Women's Plus Size V-Neck T-Shirt
Sweatshirt
Hooded Sweatshirt
Performance Dry T-Shirt

Men's:
Men's Tank Top
White T-Shirt
Light T-Shirt
Ringer T (Black/White, Red/White, and Navy/White)
Green T-Shirt
Yellow T-Shirt
Men's Sleeveless Tee
Baseball Jersey (Black/White, Red/White, and Blue/White)
Fitted T-Shirt
Long Sleeve T-Shirt (White and Ash Grey)
Organic Men's Fitted T-Shirt
Organic Men's T-Shirt
Performance Dry T-Shirt
Sweatshirt (White and Ash Grey)
Hooded Sweatshirt (White and Heather Grey)

Sleepwear:
Women's Light Pajamas (Checker and Pink)
Men's Light Pajamas

• http://www.cafepress.com/greymattersstore/8420684
• Design by: Grey Matters
• Price: $19.99 and up (CafePress.com)
• Product type: Clothing (Men's & Women's Tops, Assorted Styles)
• None
• Description: Ever have a back itch and couldn't tell your partner exactly where?
  
  With this top's grid on the back, along with the guide on the front, you can direct them exactly! Fun AND functional!
  
  These shirts are available in many styles and colors for men and women. (Learn more...)