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Bits and Pieces Yin and Yang Metal Brainteaser Puzzle$8.99
It may take an infinite amount of time to solve this mind-boggling metal brainteaser by designer Doug Engel. A great gift for people who love brainteasers and trick puzzles. Will you be the one to unravel the mystery? Try to take the four nickel-plated pieces apart then fit them back together.
2-1/2" in diameter. Solution included.