The local Air America Radio station runs probably half their commercials as public service announcements (PSAs). One that pops up quite frequently urges listeners to visit the DOE's Energy Hog web site for energy conservation tips. I didn't quite have the patience to navigate the Flash-based tour, but with a speedy internet connection, I would think that grade-schoolers would not get bored while learning a few things.
One very strange thing I noticed. Something about a resemblance.