Ivan's Hinge

Boing! Toy Shop Verified independent store

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Fold, loop, bend, twist, and turn to find a solution! Patterned challenge cards invite curiosity, logic, determination Brainteaser & mind-builder - refines visual spatial skills. I deal for brain stimulation and relaxation. Includes 1 Ivan's Hinge Puzzle, 56 Challenge Cards Exceptionally high quality construction and materials. Created by famed puzzle creator Ivan Moscovich. Ages 8 and up Show more