Hi! We just recently got back from taking our 2.5 yr. old twins. They had so much fun! We only did MK and Epcot this trip, but some of the highlights for the twins were:
Toontown: Goofy's Barnstormer, and the little playground
Tommorrowland: Buzz Lightyear, TTA
Fantasyland: the teacups, Pooh, Mickey's Philharmagic, and of course, Small World
Adventureland: Alladin's Carpets, Jungle cruise, and the Tikki Statues that spit water (they loved that most of all, I think!) They were very scared on Pirates, though.
Epcot: Journey into Imagination, Nemo, Mexico pavillion, and the little playgroung in the world showcase, eating deserts in France. I know they would have loved the Maelstrom, but it was being refurbished at the time.
My girls really just loved being able to get out of the stoller and walk around in a public place! (holding our hands of course.) We would park the stroller, walk from ride to ride, then they would be so tired that they would actually climb in the stroller themselves to rest....unbelievable! At home they hate the stroller!
But really, they had a great time, even with limited attractions to participate in.