I have been thinking about a look at a Roleplaying game with the kids - engage them at their fluid dynamic gaming rather than the structured style that computer gaming and many board games push.
This RPGs for kids list is excellent and covers the cheaper end of the spectrum beautifully. There are things like Inspectres, TOON, etc. I wouldnt mind having miniatures in the mix as well - esp if they were kinda fun. Maybe something like GURPS Powers might suit as I can get minis to use and super heroes are nice'n'tough, that also puts D20 things in the mix as well.