Frozen

For Bug's first movie we decided on Frozen. It got generally good reviews from both the critics and other parents. I had also heard enough about it to believe that it wasn't the standard Disney princess movie where the hero and true love save the day. I'm not reflexively opposed to traditional fairy tale based princess movies, but I also like subverting tradition when possible.
Despite a rocky beginning, the outing was a success.
It turned out that the screening we went to was in 3D, so Bug was a little thrown by the glasses. Some of the previews were a little intense for her as well. The worst trailers, for a little kid, were for Maleficent and How to Train Your Dragon. How to Train Your Dragon was rough because, Bug saw the nice holiday special, so had happy feeling towards it. After the initial intro to the trailer, things get a little scary.
Frozen was excellent. There are a few heavy moments, but nothing truly scary. The music is great. The animation is luscious. The 3D effects were the smoothest I have seen. I do think that the movie is just as good without them; the 3D doesn't add anything. Bug stayed quite through the entire movie. She moved into the aisle a few times to get a better view of the screen. After the movie, she went home and asked to watch the trailers again. When asked what her favorite part of the movie was, she replied "the music."
Most of the story went over her head, which is to be expected given that she is under four. For us, or for a child old enough to follow it, the story is great. It balances serious and humor well. The tension is modulated well for the audience. You get that big things are being dealt with, but there are very few scares. The best thing about the story, for me, is its subversiveness. In many ways, it plays like the standard princess fairy tale with slight updates to make the princess more spunky ala Tangled. Then the plot turns and it is no longer in traditional fairy tale land.
The pre-movie feature, featuring classic Disney characters, is also top notch. To be most effective, it does require 3D, but it is a fun use of the technology.