I just asked my 3 year old daughter what her favorite parts of Disney World were (we went in Feb). Her replies were the tea cups (did over and over and over again), Figment ride, making chocolate chip cookies at Sunshine food Court in Epcot Land, Philarmagic Show, the playgrounds at MGM/Animal Kingdom. I will add that she did not like (was scared of) snow white's ride, peter pan's ride, and the boat ride in Norway. Try not to overplan since sometimes it is small things that really gain the child's attention.