stuff to do > things to make > polyhedra > some fundamentals
The surface patterns illustrate internal structure, a fractal froth of dodecahedra.
Four tetrahedra and one icosahedron form a large tet with the icosa inside — and a hidden octahedron!
One has a clockwise twist, the other twists counter-clockwise!
These are quick and easy for a five-minute project. Yet the surface patterns reveal a fractal octet truss in the interior.