We love Epcot...it's just so neat!!! Our dd is almost 4, and we have been taking her there since she was 1.
Here's what I can think of:
Turtle talk with Crush in the Living Seas
Just watching the fish at the living seas
Spaceship Earth
Letting her get her own drinks at Ice Station Cool
Ellen's energy adventure
Trying all the things in Imaginarium
We hope to get her on Soarin' this trip.
If they like 3d shows (ours does not) the show with Figment is supposed to be cute.
Honey, I shrunk the audience
Play in the dancing waters
There is enough for her to do at Epcot to keep her happy for two days. One day, we go around and make the "masks" at all the countries, and the next day we do all the "projects" as we visit the other places. Make sure you get them to do the kids' projects in the future world pavillions as well as the WS.
Beca