It is a crazy program, but very fun for elementary kids. Gifted teachers tend to love it -- a bit too much in my opinion.
Basically, it is a combination of engineering and drama. The kids have to work out a problem over the season, and then do a skit about it. For example, a few years back was mousetrap vehicles (the vehicles had to be powered by mousetraps, and accomplish a set of tasks, all tied together with a performance).
http://www.odysseyofthemind.com
Great for little kids. Way too dorky once they are big (at that point, the kids can move into straight engineering programs if they want, or straight theatre.)