People Pythagoras Flash Plate "Crane Building" From neuroscience: About 70% of Tokyo University students played with blocks in their early childhood. Block play is said to improve dexterity, increase concentration, enhance spatial awareness, and foster creativity and imagination, making it effective in building brain circuits. This item is discontinued. It requires a lot of thinking to play, making it a great educational toy. It's also a very good toy for Montessori education! Instruction manual and product box are missing. There are some signs of wear and tear due to use, so please understand before purchasing. Please check the condition in the images. Working Cars Crane Truck Vehicles