I don't know where you are, and that may make a difference, but I worked at a theater all through high school and some of college....and I've NEVER seen a morning kid movie run out of seats. I'm assuming that's what we're talking about...like 10am or so showings of older kids movies? They're super fun, but not really a big crowd draw. Most parents are working that time of day, even during summer. I'd still be 1/2 an hour early at least so you have time to pick the seats you want.