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
We built so many boxes, and you could connect then together -- it became almost like Lego. At one point we used an empty cubicle as a museum for the creations we made, probably a thousand business cards wasted on cubes!
From the article:
That gallery is great though, thanks for the link!