Several rides - Mexico and Norway boat rides, Living with the Land, Nemo, Figment, Spaceship Earth, possibly Soarin' (don't know the height requirement off the top of my head). In the Nemo pavilion, there are aquariums to look at and an interactive show with Crush from Nemo. Plus there are some really fun play/learning areas - after Figment, after Mission Space, and in Innoventions. There are several characters to meet, as well. I don't know too much about it, but there are little Duffy stick puppets they can color around the World Showcase. I think Epcot's a great park for that age. Plenty to do and not as over-stimulating as Magic Kingdom.