I just spent two hours watching my nephew play a computer educational game called "Jump Start" for fifth graders. There is a lot of great content on this game and it was quite difficult in parts. It even has a virtual museum to teach kids about famous artists. The game does through in some irrelevant activities of skateboarding and dodging falling rocks in an attempt to make it more like a video game. I found it interesting that my nephew actually dreaded these parts and tried to get to the educational parts as quickly as possible. The educational activities were much more interesting than the rest. If you are interested in finding out more about these games, check out: JUMPSTART.