This school year, I've decided to try to have a “Project Day” (really, a smallish part of an afternoon) every week for Liam. It's working out fairly well – not flawlessly, but fairly well :) Liam received a couple of books for Christmas that were particularly suited to some projects that are both fun and educational. One in particular, the Rubber Band Engineer, is one of the best books for mid-sized (and up) boys I've seen. It has directions for several varieties of catapults, rubber band guns, and even simple hydraulic tools using syringes and tubing.