nope no height requirement as long as you plan on going with her. We took DD when she was 2 and she went on all sorts of rides Alladin, small world, spaceship earth, winnie the pooh, peterpan, snow white, pirates,etc.etc. She even managed to bang her head on the height thing for the barnstormer while skipping under it. The guy let her on (I was terrified) She loved everyone of them! I think she actually had more fun at 2 than she did at 3. No fear yet.