This fun model hinges from a square to a triangle and back again.
The design is based on Dudeney's famous hinged dissection known as the "Haberdasher's Puzzle", and is optimized for printing in SLS in Versitile Plastic. For more information or to get a free 3D-printable download of this model that is optimized for desktop FFF/FDM printing, see our
Hacktastic post.