Dd hated it when she was a few days shy of turning 3. The moment she started crying I took her out of the theater and then we just waited for dh to come out.
When she turned 4 she decided to try it again, and even if it is definetly not her favorite attraction, she sat through the entire presentation.
We were close to the exit in case she wanted to leave, and I think that just having the peace of mind of knowing that we would leave if she didn´t like it, helped her through the movie.
Now, I am sure that A Bug´s Life and Honey I Shrunk the Audience will terrify her, that is why we have stuck with the Muppets and Philarmagic for now.
Julie