Great show, little wait every. Great AC. Great show to do in the heat of the afternoon.
the most I've ever had to wait is basically the duration of one show, since they don't let guests enter during the show.
It does draw a healthy crowd, it just has a very large capacity.
If the little ones hate loud noises, loud surprises, or hate 3-d (glasses), those could potentially be issues for a few folks. The show is not scary, just loud. Ear plugs or covering your ears may be a solution, or taking of the glasses.
I don't know why the indoor shows have to be so BLARINGLY LOUD!!!! Many are, and it can't be good for our ears.