I have a nephew who has always been fascinated by my ability to start a fire with non-traditional tools.  We had a camp-out once where I started our camp fire with a chunk of metal, a rock, and a knife (magnesium shavings and sparks will start a fire even in wet conditions.) He spent quite a while trying to figure out what the “trick” was.

Here’s a site that provides instructions for starting fires with primitive tools, including bow drills, hand drills, and flint/steel.  They also sell bow-drill equipment, which sort of seems like it defeats the purpose, but hey, whatever lights your fire.