Kid's movies that touch on adult subjects, but at a simplistic level that apes at understanding... Like Marry Poppins and Women's suffrage. It's in books too, like The Whipping Boy, where oppression by the nobles is a whimsical journey of discovery. How to introduce children to adult concepts through art, without creating a false narrative that presents over-simplified half truths? Not sure what the answer there is, but The Sound of Music definitely falls into that... von-trap (couldn't resist the pun).