Crochet, I have very little understanding of it, I think it’s like knitting, but with a hook? Anyway, my ignorance is not the point, the point is that it is a simple way to model really weird things. Watch this video. I’m going to go buy some yarn. (Thanks to Amie for the link!)
p.s. If there is anyone in Windsor who knows how to crochet, would you be interested in teaching a bunch of math students?