All Why Toyz Worlds are designed using PLA filament. PLA is a bioplastic, compostable and non-toxic. It’s derived from renewable resources, such as corn starch, sugar cane, tapioca roots or even potato starch. This makes of PLA the most environmentally friendly solution in the domain of 3D printing and is considered safe for children when printed. Obviously, attention must be made so that kids do not put the pieces in their mouth and chew them.