This crochet size and weight infographic details all the different yarn weights and the specifics of each. It breaks down the yarn type, weight, wraps per inch and ply. This infographic also includes a chart of different crochet hook sizes.
Interesting article on wabi-sabi.--Characteristics of the wabi-sabi aesthetic include asymmetry, asperity (roughness or irregularity), simplicity, economy, austerity, modesty, intimacy and appreciation of the ingenuous integrity of natural objects and processes.
Since I can't just run to Hobby Lobby in Cameroon, I'm investigating making my own art and craft supplies. Here are steps for making crochet hooks. I imagine making knitting needles would be even easier. Ooh! I can probably make them out of that dwarf cypress tree that I accidentally killed.