Update Feb 22, 2024

I have deleted the original STL file for the project, and replaced it with 2 new ones, one a reflection of the other. This allows tetrahedrons and the other platonic solids to be made with rubber bands facing both inwards and outwards. Both parts have been improved by having a radiused edge to simplify clipping, and the reversed part has both a witness mark and a radius to distinguish it from the original part. This makes the 2 parts easy to distinguish by sight and by feel, so vision impaired people can work with them.

Update December 31, 2022

There's a peer reviewed article published about this form of sculpture now. The offficial site for the article is at https://search.informit.org/doi/abs/10.3316/informit.758374895150655 but you can get a free version of the article here, https://www.researchgate.net/publication/366578178_Circles_for_Maths_Art_Play_and_the_Circular_Economy . (You are welcome) If you're using this article in your research, please cite me!

This is a single piece cd construction kit which is combined with cds, rubber bands and 2.6mm bamboo rods to make regular polyhedra including cubes, tetrahedrons, dodecaherons, octahedrons and (at a pinch) icosahedrons. For more information and some further variations and maths derivations, see http://tribo3d.blogspot.com/2021/01/one-piece-construction-kit.html and http://tribo3d.blogspot.com/2021/01/cd-clocks-part-2.html. If you have enjoyed and used this file, please post your makes and variations. Regards Steve Nurse

PS. Pieces are compatible with the construction set which is available at https://www.thingiverse.com/thing:3313632 .

Cetus

Yes

Yes

0.6

100%

Not a difficult print. It doesn't have to win any beauty competitions.