We went when DD was 16 months. Hands down, her favorite was "it's a small world." We rode it several times.
She liked anything that you could sit in a car/boat, ride and look at things -- like Pooh, or Buzz Lightyear, or the Mexico boat ride at EPCOT and Journey Into Imagination (also EPCOT). She also liked the train ride at MK, and some of the tamer rides, like Dumbo.
We didn't stop to see the parade while we were there and we were planning to leave before the fireworks, but the kids were holding up so we stayed for "Wishes" and I think that was also a highlight of DD's trip. She was boogieing down in front of the castle. I only wish our video of it had come out more clearly!
I hope you have a fantastic trip!
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Kim
mom to DS6 and DD2
booked at POR, Dec 1-5, 2007