Triangles and pentagons that snap together. Includes OpenSCAD source files. Examples in the photos were printed on a Makerbot Replicator 2. You might need to adjust the size of the snapping nubs if you're using a different printer or material. Inspired by these things, but incompatible with them: http://www.thingiverse.com/thing:51465 http://www.thingiverse.com/thing:5961 This thing is also on GitHub: https://github.com/longears/polygon-construction-toys Available for purchase on Shapeways, but unfortunately it's really expensive: http://www.shapeways.com/model/1112999/polygon-toys-triangle.html http://www.shapeways.com/model/1113000/polygon-toys-pentagon.html