Octahedron model kit

This project is an preliminary attempt at designing a flexible 3D construction kit. Ideally, the fully realized kit will be similar in spirit to legos... but more suited to modeling complex solid geometry.

So far, the kit has 2 primitives: a vertex and an edge. The vertex is a disk with 4 equally spaced notches cut into its edge. The edge has 2 rotating heads (one on each end) which are notched to slot into the vertex disk.

An easy way to increase the expressiveness of this kit would be to