We like a lot of the Disney movies. Also Little Einstein, the Backyardigans, Sid the Science Kid and Winnie the Pooh are pretty great for kids. The Disney Channel and PBS kids seem to have the best programing.
If you don't know of any good DVDs to show kids, you can visit the website called . They have a listing of 100 recommended movies. Their listing is chosen for children between 8-12 years old.