I'm making a game about rationality that could possibly serve as an activity for these kinds of camps. But I don't have enough Karma to post about it here. You can read a bit about it here:

http://shinyogre.com/2011/04/08/a-gameplay-exploration-of-yudkowskys-twelve-virtues/

and here:

http://shinyogre.com/glenn/2011/04/13/designing-epiphany-note-1/

The game is currently in the prototyping phase.

I think that game playing as well as game development can be powerful tools for learning in general, and my goal with this game is to craft a learning experience with a narrative that is heavily laced with metaphor.