Hi Jessica,
Our family has two favorite restaurants at Walt Disney World: those we eat at for the amazingly yummy food and those we eat at because we love the atmosphere & antics. I'd love to share our favorites from the latter category, keeping in mind your little ones.
Epcot's
Coral Reef (one wall is nearly an entire aquarium; fun to watch all the ocean life)
Epcot's
Biergarten (a live oompah band entertains the crowds & kids LOVE the dance floor)
Disney's Hollywood Studio's
Sci-Fi Drive In (imagine being in a drive in theater at night in the 1950s)
Disney's Hollywood Studios
50s Prime Time Cafe (dine in a 1950s kitchen with your own tv; make sure and wash your hands!)
Wilderness Lodge's
Whispering Canyon Cafe (it isn't quiet as guests yee-haw; kids can race wooden ponies)
Polynesian's '
Ohana (ever had a coconut race?)
And there is also
T-Rex and the
Rainforest Cafe if you haven't experienced those outside of Walt Disney World.
If you click on the links, you should get a peek at the restaurants as well as most of the menus to see which your family would like best. Bon appetit!