Hi, we've been 4 times with our girls who are now 3-1/2 and 6. Their favorites have always been:
California Adventure:
Playhouse Disney Live
Turtle Talk with Crush
All of the Bugs Life area (but NOT the movie at that age)
Monsters ride
Golden Zephyr
Carousel
Pixar Parade
Toy Storia Mania (my 6 years old's favorite, 3 year old can kind of do it, but I don't know about a 2 year old)
Aladdin show
Disneyland:
Dumbo
Carousel
Teacups
Peter Pan
Alice in Wonderland
Small World
Princess FF
Pooh (still my 3 year old's favorite ride of all)
Parade
Astro Blasters Buzz ride
Story Book Canal
Casey Jr. Circus Train
Tiki Room
Train ride around the park
Horse-drawn ride down Main St.
Jungle Cruise
Really, their favorite thing of all is the autograph books and meeting the characters, primarily the princesses at the younger ages when they were still scared of some of the characters. They love all the shows and parades.
The things they cried on at age 2-3:
Bugs Life movie
Mr. Toad's Wild Ride
Roger Rabbit Cartoon Spin
Goofy Go Coaster
Snow White
Matterhorn
Big Thunder Mtn Railroad
Fireworks (younger daughter who is sensitive to noise) :-(
Fantasmic ("evil" parts scared them)