Anna Paquin has been a child actor even before her role as young Rogue in X-Men. Don't let the grey streak in her hair fool you (it's not real). I remember seeing her in one of her first movies, "Fly Away Home," which is a movie about a little girl who helps geese learn how to fly by building a one-woman airplane and flying with them. It's completely insane, and totally awesome because of that.
I don't remember the specific details of the movie because it's been so long since I've seen it, but I do remember watching it dozens of times. I distinctly remember liking it because of the absurdity of a little girl flying a mile up in the sky with some geese. Parenting was a lot more relaxed in the 1990s. You don't see too many kids doing that these days.