Hi,
I found an educational site with some games for kids: http://nobelprize.org/educational_games/
They are all falsh games now. I think we could do it better with squeak. Because squeak can provide much more exciting interaction to the player. Anyway, I think this site has done a good job to make young children be interesting in science and Nobelprize.
Best regards. Yours, Liu.
squeakland@lists.squeakfoundation.org