Leafing through my copy of Drawing Origami Tome 2, I noticed a spectacular modular designed by Francesco Mancini that I knew I had to try:

Modules folded from 2×1 rectangles lock together really nicely, creating clusters of 3 and 5, forcing the megastructure to curve gently into a spikey ball.

Folded over a period of 2 days, this was actually pretty quick, and I discovered a simple way to lock that sped up the construction considerably.

Folded in red, it is really hard to photograph. There is a bit of “play” in this ball, making it much bigger and I think it wold be a little less stable, but might be really beautiful illuminated from within.