“Where Do Our Letters Go?”, “Coronet Films”, “Where Do Our Letters Go? (The Postal System)”, 1956,

“Shows how the invitations to a little boy’s birthday party are prepared for mailing, collected from the corner mailbox, cancelled and sorted at the post office, and delivered. Explains what is meant by rural delivery, air mail, and special delivery.”

“Planning a surprise party for Jerry’s birthday, his mother and sister mail invitations to Jerry’s friends. Seeing how the invitations are prepared for mailing, how they are handled at the post office, and how they reach their destinations helps children understand the workings of our postal system”