Molly finds two packages in the mailbox with no addresses on them. Although both packages have brown wrapping paper around them and are the same shape, one is big and the other is small, one has string around it and the other doesn't, one has few stamps on it and the other has lots of stamps on it. By observing these differences, Big Bird decides which of the two packages he intended to mail to his Granny Bird.
David has a square which is made in such a way that he can pull on two sides of it and they extend to make a rectangle. When he pushes them back in, it becomes a square again.
Wally and Ralph solve the problem of how to keep a swinging door open as they attempt to carry a heavy plant out of the room.
Mr. Hooper points out all the objects around that represent the number 4 -- there are four toy horses, each one has four legs, and there are four boxes which they fit into. Rafael repeats the skit in Spanish.
Ernie and Bert: Everything is getting wet, because it's raining and a window is stuck open. But Ernie explains that he can't fix it now because he'd get wet in all that rain. When the rain stops, he explains to Bert that since it's not raining anymore, nothing's getting wet, and there's no reason to fix it.
Cartoon: Two boys notice a D, saying it looks fat. A resonant voice (Gary Owens) informs them that it's the letter D. This leads to a jazzy story about a dog who digs for dice, wins a duck, and buys a dinosaur with a dime. Moral: "If you dig a dinosaur, drop your duck for a dime." (First: Episode 0016)