My verdict: Ignoring the moral flaws of the film, I'm not sure this works well as a children's movie. Whenever the foxes smiled it looked rather scary. And there was a completely bizarre scene where Mr. Fox stops to talk to a non-responsive wolf. And then he moves on. Completely bizarre. Overall, the story wasn't good enough to justify the many years it takes to complete a film using stop-motion animation. I'm not really sure what I was supposed to get out of this film. That we should give in to our baser natures? That's a terrible moral. Don't show this movie to your kids.
 I wonder if they got George Clooney to voice Mr. Fox because he was the main character in the new Ocean's 11.
 On the other hand, the title cards introducing each new development in the plot looked like they were done using MSPaint.
 Of course Hollywood disagrees with me (as well as the majority of film reviewers—see http://en.wikipedia.org/wiki/Fantastic Mr. Fox (film)#Reception). In fact, they nominated Fantastic Mr. Fox for an Oscar in the "Best Animated Feature" category. Fortunately it lost to Up.
Smiling Fox is by Rob.Baldwin, available at http://www.flickr.com/photos/robbaldwin-photography/4244416128/.