The indoor playhouses are made of fiberboard (MDF) 19mm thick, with rounded edges all for maximum safety. The models for public use have the edges fully painted for maximum durability. All the fittings are made of steel. Our indoor playhouses are designed with the children well being and safety in mind so that while they play and have fun, the parents can really relax. Every kit includes detailed instructions, and all the fittings for the complete assembly. In our indoor playgrounds every detail has been studied carefully to offer an extremely safe space for children, like finger protection, belleved corners, methacrylate glass, water-borne paintings, etc. The assembly is very simple: in 20 minutes, the playhouse will be ready for the children to play in!