3D Wooden Cube Brain Teaser PuzzleMind IQ and Logic Test for Kids and Adults

100% Brand new and high quality. -The lock may look simple, but it contains lots of mysteries. -In most cases, it is unable to untie the knot, but as long as you master the structure, is sure to solve. -Challenge your mind and patience.Your mind will be sharpened enough to develop their problem solving capacity through reasoning, development of mental stamina and boosting their self-confidence. -Our product lets you know the challenge does not have the limit.