I've got a four-year-old. Of course we've seen it. Twice.
Actually, it was pretty good, though it was much less interesting the second time around. There's one scene that I thought was really intense for the mostly-preschool kids in the theater, but otherwise, it's just very nice. The music by Carly Simon is pretty good, too. We've got the CD in the car right now. (Don't be surprised if Habitat for Humanity launches a TV campaign using "With a Few Good Friends", if they can get the rights to it.)