D.K.
There is some good research in this area. Lying is normal (meaning all kids experiment with it, not that it is right or to be encouraged). There is also some good evidence that stories with negative consequences (the boy who cried wolf) result in kids who are better liars while stories that show the benefit of telling the truth (George Washington chopping down the cherry tree) result in less lying. Punishment results in better (less likely to get caught, not morally better) and more frequent lying. This is true even in cultures where a child lying results not in a time out but in real physical punishment/chopping off of a hand sort of thing. Please take a look at the link - it is a great article. I would personally avoid any movies that show 'consequences' for lying since it is counter productive. And since you are going to need to watch the movies with him and discuss them to gain anything, I would just stick to books (less investment of my time watching less than entertaining kid 'entertainment')
http://www.npr.org/templates/story/story.php?storyId=1122...