We've taken both of our children since they were 6 months old. They can pretty much ride anything without a height restriction. Pretty much everything in Fantasyland. The main rides I can think of they can't ride are Space Mountain, BTMRR, Goofy's barnstormer- my 2 year old wasn't tall enough, and maybe one or two more. Same for the other parks. They can ride anything without a height restriction. MGM- they can do all the shows, they'll love the playhouse disney show. They can also do the backlot tour and the great movie ride. All the parks have a lot they can do- have a great time!