Jim Henson's Muppet Babies, commonly known by the shortened title Muppet Babies, is an American animated television series that aired from September 15, 1984 to November 2, 1991 on CBS. The show portrays childhood versions of the Muppets living together in a nursery under the care of a human woman called Nanny (the whereabouts of their parents are never addressed). Nanny appears in almost every episode, but her face is never shown, only the babies' view of her pink skirt and purple sweater as well as her distinctive green and white striped socks. The idea of presenting the Muppets as children first appeared in a dream sequence in The Muppets Take Manhattan, released two months before Muppet Babies debuted, in which Miss Piggy imagined what it would be like if she and Kermit the Frog had grown up together. Wikipedia
Scooter: What happened. Fozzie?
Fozzie: Rowlf went into the closet to think about my joke. He'll probably come out when he thinks it's funny.
Skeeter: Boy, we'll never see him again.
Fozzie: Yeah... Huh?