Okay, here's my list that I send to my friends. My kids have been going since they were 18mo. and they love these three parks. My oldest is 7 and this year we're going to try to do more at Epcot.
Animal Kingdom - boneyard playground, Camp Minnie & Mickey - charaters
Festival of the Lion King, Kilimanjaro Safaris, Mickey's Jammin Jungle Parade - 3pm, Rafikit's Planet Watch & Maharajah Jungle Trek - zoo, Triceratop Spin
MGM - Al's Toy Barn - Toy Story characters, Beauty and the Beast Live Show, FANTASMIC night show, Honey I shrunk the kids playground, Meet & Great with Jojo and Goliath, Motor Car Parade - 4pm, Muppet 3D Vision, Playhouse Disney live stage show, Voyage of the little mermaid
Magic Kingdom - Ariel Grotto - only place you can see Ariel up close
Buzz Lightyear's ride, cinderella carrousel, country bear jamboree, Dumbo flying elephant, Indy speedway,it's a small world, Judge's Tent - Character spot, mad tea party, Parade - 3pm, PhilharMagic 3-D-indoor a/c, Spectromagic parade, Storytime with Belle - act out story with belle,
tomorrowland transit - slow ride good for naps, Toontown - mickey & minnie house, Wishes fireworks