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Worlds Smallest Rubiks Cube - Brainteasers for Ages 10 to 11 - Fat Brain Toys. What has six colors and holds secrets of engineering, algebra, and geometry? What is small enough to fit in your pocket and difficult enough that many people give up without ever solving it? Why, it's the World's Smallest Rubik's Cube, of course! T... - Worlds Smallest Rubiks Cube - Brainteasers for Ages 10 to 11 - Fat Brain Toys. | | $8.95
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