There's a documentary airing on public television that you should try to catch if you have a math kid in the house. It follows the 2006 US Math Olympiad team from qualifying competitions to the actual Olympiad test day. It goes into the background of the Olympiads and how they and their parents nurtured their math talents. On the left side of the page you can click on airdates to watch it on TV or how to order the DVD if interested.

http://www.hardproblemsmovie.com/