While this movie is definitely family friendly (as evidenced by the G rating), adults will get as much (maybe more) enjoyment out of this movie. In fact, when I went on Saturday night, I didn't actually see any kids in the audience. To be fair, it was the late show (9:40pm), so they could have been in the earlier showing.
Do yourself a favour and see this movie. Compared to anything else out there, this one deserves your money. Definately the best movie I've seen in 2011. Although, to be honest, I don't always remember every movie I've seen. I should go back and make a list.