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WATCH VIDEO!
This 14-sided 3D puzzle is so addictive it will have you tied up in knots. Actually, what you want to do is untangle the colored strings to remove all the knots. With so many possibilities for solving the puzzle, it's no wonder this mathematical masterpiece is a Brain Child Award recipient.
Using the rubber tips, you move the elastic strings to create a solid color on every side and untangle the knot in the middle. Moving the colors around is easy, but untangling the knot? Not so much. Fun, addictive, and challenging, Brainstring Advanced® is a super workout for your brain.
[Video Below]
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(Ages: 7 and up)
#30208 - approx. 5'' diam.
Our price $21.95
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