Children who have just learned to walk can pull the traction rope, and the small train will turn the building blocks to speed up learning to walk. Help develop children's hand-eye coordination ability, children can build different towers, shapes. The building blocks are made of beech wood. They are resistant to pressure and drop. Don’t worry about cracking. The size is large enough, don’t worry about the child swallowing. This toy is adorned with non-toxic water based paint to keep your little one safe.