I'm not sure there are many movies I can think of that a 2-4 year old would sit through 2 hours of. I think that age range, at least in my experience, does better with a DVD at home where they can get up and take breaks as needed.
So maybe it might be better to wait for DVD on this one as well?
I think it's probably a good thing that young kids are active and interested in moving around

We can all learn from them!