I've got a friend who has a 7 year old son fascinated by sound equipment. He wants to learn more about how stuff works. He was thinking for his 2nd grade science project next year it would be really cool to be able to build a speaker. There's lots of stuff out there about designing and building your own enclosures. But we are talking about a 7 year old who just wants to wrap a coil around a paper cone and make it bounce up and down enough to pump some AM radio through. Anyone ever mess around with building a simple speaker driver? I would love to help this young techie out but I'm more of a lighting guy. My best idea so far is to just carefully dissect a speaker and help him put it back together. Any other ideas would be great.