Molly Ringwald (I don't think the movie’s named after her) and David Aaron Baker star in this melodrama about an English and an American girl getting to be friends during World War II. I'm not familiar with the American Girl series, but it is based on the popular series of books for young girls. Look for tragedy and the horrors of war in a bloodless, uplifting way for young children.
IMdB: Molly: An American Girl on the Home Front
Wikipedia: Molly: An American Girl on the Home Front