Mathematics & Illusion

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The book's softcover surface contains swirling lines of blue, white, gold, and red that create a swirling optical illusion. The trim is black; the text is white and gold.
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Seeing: 30 Hands-On Visual Discoveries by the Exploratorium
$ 14.95
Prolate ellipsoid made out of sold non-magnetic aluminum that, when one spins on its side, will flip upright and continue to spin. It sits upon a flat round mirror encased with a black rim.
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Aluminum PhiTOP
$ 20.00
It is a black ceramic mug with a black and white circular optical illusion etched on the front.
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Exploratorium Optical Illusion Mug
$ 11.95
The game's cover is purple with transparent numbers in the background; there is a magician holding a wand on top of a cloud with the words "Proof!" in red.
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Proof!
$ 17.99
A white box with graph paper lines with Math Fluxx and zero through eight filled in with different colors.
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Math Fluxx
$ 16.99
Male wearing a black short sleeve shirt with the eclipse optical illusion in white on the front. Exploratorium in white on the left shoulder.
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Exploratorium Eclipse Optical Illusion Unisex T-Shirt
$ 24.00
"Math with Bad Drawings" is a hardcover light blue book with mathematical equations in gray and a stick figure character in the right corner.
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Math with Bad Drawings: Illuminating the Ideas That Shape Our Reality by Ben Olin
$ 27.99
A paperback book that is 10.9" x 8.8". The cover is beige with text down the front. There are squares and a circle on one side.
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Can You Solve My Problems?: Ingenious, Perplexing, and Totally Satisfying Math and Logic Puzzles by Alex Bellos
$ 15.95
"The Ultimate Book of Optical Illusions" is a softback copy with a white cover; contrasting legs create an optical illusion.
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The Ultimate Book of Optical Illusions by Al Seckel
$ 19.99
A gentleman is standing while playing with a blue light-up Kendama. The Pi shirt is black with gold ink in 1,878 digits of Pi surrounding a blank Pi symbol.
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Exploratorium Pi Unisex T-Shirt
$ 34.00
The kit is in a small metal tin; it is black and pink with a scientist working on a chalkboard.
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The Crazy Scientist Mini Kits
$ 10.99
The game's cover illustrates a gray duck and a white swan holding the puzzle pieces for one and the sun.
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Pre-School Numbers Puzzle Pairs
$ 15.99
8" x 8" board book illustrated book cover of the ABCs of Mathematics. Three circles with Addition, Base, and Chord. Red spine with science tools in white .
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ABCs of Mathematics by Chris Ferrie
$ 9.99
"The Girl With a Mind for Math" is a hardcover book with a green cover representing a chalkboard. A young Raye Montague is drawing math equations on the chalkboard.
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The Girl with a Mind for Math: The Story of Raye Montague By Julia Finley Mosca
$ 17.99
A light blue book with an illustration of Ada Lovelace on the cover.
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Little People, Big Dreams Ada Lovelace by Maria Isabel Sánchez Vegara
$ 15.99
A gray box with different magic items along with top and bottom.
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Magic: Silver Edition
$ 30.00
"Grandpa Magic" is a softcover book with a yellow, blue, and red illustration of an older male magician doing dazzling an audience of kids with lightning from fingertips.
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Grandpa Magic: 116 Easy Tricks, Amazing Brainteasers, and Simple Stunts to Wow the Grandkids by Alan Zola Krenzek
$ 17.95
A 16oz pint glass with an image of Ada Lovelace with math symbols around the outside printed in black. A golden beer fills the clear glass to show contrast against the black printed sections.
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Ada Lovelace Pint Glass
$ 18.95
A set of four white ceramic pudding bowls with the proofs of classic theorems of Euclid, Hippasus, Pythagoras, and Gauss. Each bowl is 8 oz., 4” diameter, 2” tall
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Proof is in the Pudding Bowls
$ 31.00
A clear cake dish with a Pi symbol brown sugar cake dusted with powdered sugar.
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Exploratorium Pi Cake Pan
$ 16.99
The Miracope is a black circular shape with mirrored optics that projects a green frog into a three-dimensional floating position on top. 
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3-D Mirascope
$ 11.00
Blue, red and white packaging surrounds two white 12-sided target dice and three blue scoring dice; a blue pouch and sample dice sit in front.
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Math Dice
$ 7.95
The book's softcover surface contains swirling lines of blue, white, gold, and red that create a swirling optical illusion. The trim is black; the text is white and gold.
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Viendo: 30 Descubrimientos Visuales Interactivos
$ 14.95
A white book with a black and white lenticular image of a horse that moves with the book. The book title Gallop! and the author's name are in different colored letters at the top.
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Gallop!: A Scanimation Picture Book by Rufus Butler Seder
$ 16.95