Only the sharpest tools in the box can solve this solo-play brainteaser puzzle! Clever kids and adults face off against 80 different challenges, trying to fit all 13 screws completely into the cube without them blocking each other. Includes 1 transparent cube, 4 short red bolts, 4 medium yellow bolts, 5 long blue bolts, and challenge booklet with 80 3D challenges and solutions.
