If you're a knitter trying to stick to a budget you can build a relatively simple machine to reclaim yarn from sweaters using a bicycle wheel and chain and a tea kettle. Design weblog PSFK showcases ...

3D printing is great if you need to create something made of plastic or even metal or ceramic out of thin air. But what if you want something fuzzier and warmer? Something, like say, a hand-knit scarf ...