A child's playhouse, designed so that small children can play inside it, made up of a set of plastic material parts the assembly of which results in a ground floor formed by a rectangular base prism with four orthogonal walls and a ceiling that also serves as the floor of the upstairs part. This has a slight truncated pyramid shape with a rectangular base, four walls and a double sloping roof. Assembly of the parts is generally made by caps (1) that, by means of a screwdriver, can be screwed on to square headed screws (2) through coinciding orifices made on the parts to be joined.