red 3D self-installed rose crystal building block ,Diy Puzzle educational jigsaw toy AZ19162 This three-dimensional puzzle can challenge your IQ and patience. The three-dimensional crystal puzzle makes up for the monotony of the flat puzzle, and has a three-dimensional and realistic sense than the wooden puzzle.Give you a recreational and educational space after dinner and work. It can be placed in your home, office or other places, or it can be used as a gift for family, friends, lovers, and colleagues.This toy is assembled from 44 small building blocks to exercise your hand-eye coordination.It has obvious training and improvement effects for players with ADHD and learning difficulties, and subconsciously cultivates players' physical knowledge and flexibility.