Sesame Street has built up a good history of sweetly spoofing shows that young children would—hopefully—never watch in order to teach them life lessons, and builds upon that with its most recent: True Mud.
True Mud follows a grouch (gasp!) in a diner, just trying to get some True Mud. Instead, he only gets rhymes. (You'll find out what a rhyme is, don't worry.)
[via Sesame Street]