If you're the kind to need a low-attention project to keep your hands busy, you can use business cards (or I used index cards, quartered) to make models of this pretty easily, and they're remarkably durable. No tools needed at all, it's just one pattern repeated as many times as you feel like. The base square unit also makes a decent 6-sided die of whatever size you want.

Other forms of modular origami can also be fun, e.g. five intersecting tetrahedra is similarly just one common paper pattern: http://mars.wne.edu/~thull/fit.html