You’ve had some great suggestions here! Our family is a bunch of Disney nuts, and we have several good friends who are performers in some of the parks and shows.
Our favorite place is the World Showcase part of Epcot; there are some pleasant, gentle rides there (Mexico, Norway) and wonderful films in several of the pavilions, as well. We love strolling from “country” to “country”; it is really lovely. We also particularly like several of the restaurants - Le Cellier in Canada (very popular steakhouse with divine cheese soup) and the Teppanyaki restaurant in Japan. I understand that the French restaurants are very good, as well.
We’ve stayed at many of the resorts, and Pop Century is fun and wonderful for kids. There is something especially fun about staying on the grounds; the free transportation is great, but we generally prefer to drive, as parking for resort guests is free at the various parks. You can also explore any of the other Disney resorts, as long as you have your parking pass and ID; it’s fun to eat at various resort restaurants, even if you are staying elsewhere. We were there last month to watch my daughter run in the Disney Marathon, and just loved Boma, the buffet in the Animal Kingdom Lodge. It’s also fun to go to one of the “overlooks” in the Lodge and watch the animals on the savannah (I understand some work is going on, so you may want to check to see if those are open.)
We love the Animal Kingdom, and I could spend hours watching the gorillas in the African section; sometimes, I’d swear there are people in gorilla suits, the way they stare at you! Kids just love the animals.
When will you be there? It can be pretty crowded during spring break times, but the Unofficial Guide, mentioned previously, should help out with strategy.
Have a terrific time!