I don't do it much lately due to school, but I spent several years learning to be a weaver. I've done everything from belts to blankets, and even tried my hand

I don't do it much lately due to school, but I spent several years learning to be a weaver. I've done everything from belts to blankets, and even tried my hand at spinning yarn. Weaving is actually a lot like programming (the Jacquard loom was one of the first machines to use punchcards) in that you set the system up with a set of rules and then run it. Different systems give you different languages to express the pattern in, just like programming languages. The awesome thing about looms is that they're bootstrappable technology: give me some wood and tools and I can build a loom that I can then weave on. On top of that, the potential patterns you can create with these simple programs are innumerable, many of them quite beautiful.