In 2014 I made STL models of 3D Origami triangles ("Golden Venture" or "Chinese" origami). My grandmother would fold many of these and I thought it was neater and more fun to print these out for her to use. Takes the pain out of folding them, and can make for some neat builds! ABS works well enough for small builds, but Ninjaflex or other flex filament recommended for flexibility and better hold between units. I printed on a Flashforge Replicator using dual extruders and ABS/Flex Filament. Create and Enjoy!