https://web.eecs.utk.edu/~jplank/plank/origami/index-a.html
Compounds of 5 Tetrahedrons -- Gallery
compoundstetrahedronsgallery
https://digitalcommons.risd.edu/exhibit/arthur-loeb-design-science-teaching-collection/loeb-design-science-3d-models/octahedrons-tetrahedrons-built-up-to-large-truncated-octahedron/
Octahedrons, tetrahedrons built up to large truncated octahedron - Rhode Island School of Design
Octahedrons, tetrahedrons built up to large truncated octahedron
https://almostunschoolers.blogspot.com/2011/01/marshmallow-and-toothpick-fractal.html?showComment=1295124416699
Almost Unschoolers: Marshmallow and Toothpick Fractal Tetrahedrons - Math is Fun
The girls made use of the last of our toothpicks, and a bag of stale marshmallows, to create three dimensional models of Sierpinski's triang...
almost unschoolersmarshmallowtoothpickfractaltetrahedrons