1. The action of tightening screws helps children develop finger dexterity and grasping skills. 2. Multiple 3D shapes help children recognize geometric shapes. 3. Multiple colors help children recognize common colors. 4. Made of environmentally friendly, non-toxic materials, formaldehyde-free, making it safe for children to play with. 5. Smooth, rounded finish, burr-free and gentle on hands. 6. Material: Wood
