Goldilocks and the Three Bears
From Muppet Wiki
Goldilocks and the Three Bears is a classic fairy tale in which a young girl, Goldilocks, goes for a walk and arrives at the home of three bears, who have gone for a walk while their porridge cools off. Goldilocks tastes each bowl of porridge, and finds that one is too hot, one is too cold, and one is just right. She sits in the bears' chairs, and sleeps in their beds. The bears then come home to find the intruder.
This story has been referenced in a number of Henson productions. The Sesame Street characters of Baby Bear, Papa Bear, Mama Bear, and Goldilocks are all based off of the characters from the story. This fact has led to a few variations of the story, such as in Episode 4066, in which Beaby Bear and Telly Monster decide to write a new version of the story, making it have four bears instead of three and including Baby Bear's newer sister, Curly Bear, and Episode 4087, in which Baby Bear tells Telly about what happened during the bears walk.
In episode 518 of The Muppet Show, during the story of "Ali Baba and the 40 Thieves", due to budget the number of thieves is reduced to three, portrayed by Fozzie Bear and two other bears, an obvious reference to this story, made more obvious when a Muppet Goldilocks shows up.
The Sesame Street Book of Fairy Tales also features an adaptation of the story, as read by Big Bird. The Sesame Street 1, 2, 3 Storybook also featured a simialr story, "Goldi-Snuffle and the Seven Bears". The Exciting Adventures of Super Grover features a story called "Super Grover and the Three Bears", in which Grover watchews a play of the story, with Prairie Dawn as Goldilocks, and Ernie, Bert, and Herry Monster portraying the three bears.
Big Bird's Story Time features a sequence where Maria tells this story to Big Bird and Mr. Snuffleupagus.
This story was also spoofed in Dinosaurs: Classic Tales as Goldiscales and the Giant Sloths.
In The Muppets on Puppets, when Rowlf the Dog tells a strange version of Cinderella, at one point Cinderella comes to her grandma's house and finds three bowls of porridge.

