Our daughter is 3, and is growing up with Disney World. She talks about it every day, and we are not going again until May. We try to do all of the kid-friendly things when we go to each park. Some of her favorites include:
Living Seas - Epcot
Playhouse Disney - MGM
MK train ride, as well as Dumbo, Carpets, Tea cups, Pooh, Carousel
The fireworks and Spectro Magic were big hits, especially Tinker Bell lighting up the sky.
We try to do several character meals to get her comfortable around them. Her favorites are Liberty Tree Tavern, Crystal Palace, and Garden Grille.
Next trip, she is anticipating the Beauty and the Beast Stage show at MGM.