Mostly I saw the kids just running and some effects. It's a trailer but a little more variety would be good (do the youngsters talk in the movie?).
However, I see where you are coming from and I think it is a wonderful thing to do. Your grandchildren are going to love it and you are going to have such fun doing it and I say more power to you for doing it. Bravo. Hey, if you don't try you don't learn and you don't get better. I suspect you'll do both very nicely. Keep plugging away - you'll make your grandchildren proud.
