Molly meets Grover, who is wearing a postman's cap and jacket and is carrying his own little pouch. He says that he wants to be a letter carrier just like her, so she gives him a couple of letters to deliver to see how he likes the job.
Cartoon: Two boys wish a giant letter L would drop from the sky and someone would tell them a story about it, and then it happens. (EKA: Episode 0198)
When Grover delivers a letter to Big Bird, he picks up a sack of birdseed which Big Bird is mailing to his nephew. Although the sack is little to Big Bird, it is big to Grover, and he staggers under the weight.
When Grover attempts to deliver a letter to Oscar, he's told that he has to mess it up a little first. He must jump up and down on it, crumple it, pour mud on it, and hit it with a hammer. An exhausted Grover tells Molly that he doesn't want to be a letter carrier anymore.