I just discovered "Nanny McPhee," which has joined my list of favorite kids' flicks. The story's good, the acting's good, and the sets are beautiful. I absolutely love the colors in the house, and Sdalek wouldn't mind if I painted a room that way. (Seems like a lot of work--distressing and all that.)
I'm also very fond of "Finding Nemo," the Harry Potter series, "The Witches," "A Little Princess," and "Amelie." (Does "Amelie" count as a kids' flick? Maybe it's not.)
Anyone got other favorites?