I recently had a request for a book list for teaching elementary-aged children about the true heritage of America. As you've probably noticed, this is one of my favorite topics, so I've complied a list of my favorite children's books on the subject.
Good readers or read-alouds would include many from the Sower Series, such as George Washington, Abigail Adams, and Francis Scott Key. Also, the books by the George Washington'>D'aulaires are excellent, too.
For the younger ones, Nest Family Entertainment makes fun DVDs that portray the lives of various founders. I say the younger kids will like them, but even my older kids will stop what they're doing and watch these if they're on.
Once you start browsing these books, you'll likely find more great ones to add to your collection. There is an enourmous amount of good literature on the American Revolution, and it's so important for every American to know this well.