A fun set of puzzle designed for my advisor Christopher Rycroft's (https://www.seas.harvard.edu/directory/chr) May library talk on fractal! His library talk aims at promoting mathematics and science ideas to the general public, in a way that's both educational and fun/interesting. This is a demo to use to show some properties of fractal, in this case, a Menger Sponge (https://en.wikipedia.org/wiki/Menger_sponge).
If you assemble it correctly you will get a bigger Menger Sponge as shown in the pictures! :D