100% made of natural wood, water-based paint, non-toxic, vary stable and durable, the edge carefully polished.the long digital train has a train head, a train tail and ten small wooden trains with colorful 0-9 numbers on the top. each train has 4 sliding wheels which glide easily.wooden number train set that can help your kids learning letters and inspire children's manipulative ability, imagination and creativity, motor skills. it will also help them learn about colors. great for gifting... ,