I made another thing! This is a torus, made from 24 crescent-shaped pieces of paper with slots cut into them so they interlock with each other. I followed these instructions on cutoutfoldup.com. There is also a template with some ideas for nice variations here. The idea of this model is to highlight Villarceau circles. Everyone…
J. Unbehauen, and M. Martin. INFORMATIK 2017, Lecture Notes in Informatics (LNI), page 1891-1901. Chemnitz, Germany, Gesellschaft für Informatik, (September 2017)