An American Tail

I loved this movie when I was a kid and still like it now. For starters it's cute. It's also short and sweet with lots of moral lessons in it which is perfect for young audiences with short attention spans.
The only real hang up I have is that the Russian mice don't always sound Russian, well that's the adults anyway and the young mice don't sound Russian at all, but I'm sure kids aren't going to notice that.