When Owen sends a real hug to his grandmother for her birthday he inadvertently brings cheer to the postal workers as they pass the hug along.

Harry and Doug investigate when special bookmarks begin to disappear while their class is busy studying poetry and running their own post office.

On a trip to the post office to mail a present to her grandfather, Katie learns all about how the mail works.

Big Bird helps Elmo learn about the post office and what happens after a letter is mailed.

With the impending closure of the post office, the transition to the new communication system VEXT-mail is anything but smooth for the human and paranormal residents of Ghastly, Illinois. Story told mostly through letters.

Eleven-year-old Suzy Smith joins the troll-operated Impossible Postal Express, but she botches her first delivery by stealing a cursed snow globe containing a boy who claims there is a plot to take control of the Union of Impossible Places.