This wasn't a movie. It was a television special, with numerous guest stars, which gave a wonderful message that we could all still use today. Girls don't HAVE to be stuck in a house, dependent on a husband, or they CAN be in a home, dependent on a husband, but enjoying that role. Boys don't HAVE to never cry, or always play with war toys.
There is a reason this special, aired one time in 1974, is still remembered so well today. I was 17 when it aired, and while a little old for it, it was still a good show.