1. Material: wood 2. Pull out one block at a time then place it on top until the stack collapses 3. Stimulate childrens cognition of shapes and reactions 4. A great way to enhance your childs hand-eye coordination 5. Played together with dice, it can exercise childrens thinking skills 6. Promote parent-child relationship and cultivate childrens patience 7. Not suitable for children under 3 years old 8. Single piece size: 5.1 x 1.7 x 0.8cm 9. Weight: about 300g/set
