A modular playhouse comprising a plurality of sections derived from two related modular units. The first modular unit is a right angle triangle having its hypotenuse equal to twice its base. A set of two-dimensional sections based on the triangular module having linear dimensions each of which corresponds...http://www.google.es/patents/US4212130?utm_source=gb-gplus-sharePatente US4212130 - Playhouse with elements based on two modular units
Playhouse with elements based on two modular units
