Cube in Kepler Solid

This model is a modular comprised of two intersecting tetrahedra -- with a cube embedded in the skeletons of the tetrahedra. It is inspired by a model by Daniel Kelm, a paper artist in Easthampton, MA. While the individual modules are not difficult, they are not for beginners. The construction of the model can be challenging. Students should not expect to finish during the class, but they will leave prepared to continue on their own.