You might already know about the idea of crocheting hyperbolic surfaces, invented by Daina Taimina in 1997. Well, since then, the idea has been developed considerably, and I don’t think it would be hyperbolic to say people have got a bit carried away.
Margaret and Christine Wertheim, who are a science writer and a poet/performer respectively and The Institute for Figuring collectively, started work on a crochet coral reef in 2005 using Taimina’s ideas. Since then, it has grown into a vast international effort involving over 7,000 people working together to create something that’s a mixture of mathematical neatness, fascinating art exhibit, and environmental awareness project.
Anyway. the reason I mention all this is that the Wertheims want to publish a book about the project, and they’re raising money to do it on Kickstarter.