MK : Crystal Palace(Pooh N Friends)
AK: Donalds Breakfastsarus(Donald, Daisy, Pluto , Minnie )
Epcot: Don't think I've been to any! ( There is a princess one in Norway that I hear mentioned often but I have never been to it!)
MGM: Haven't been to any but I hear 50's prime time is good! It's not character it's CM's doing the acting! So don't know if this is what you want for a little child!
Contemporary Resort: Chef mickey's this is a must do for us! ,(Mickey, Minnie, Chip, Dale ,Goofy,Donald)
Grand Floridian Resort: 1900 Parkfare (Princesses and Prince and fairy godmother , other random characters )
Polynesian Resort: O'Hana Stitch Breakfast
All the Resort character meals that I have listed above are accessible from the resort monorail which you can get from the Magical Kingdom entrance area! Or you can take the ticket and transportation monorail and then catch the resort monorail! These are some I could think of off the top of my head!