Cavelings

From Muppet Wiki

The Cavelings are a trio of youthful cavepeople from the third season Dinosaurs episode "Charlene and Her Amazing Humans." Charlene Sinclair discovers them in a forest and uses the cavelings in her act at the Bob LaBrea High School talent show.

Under pressure from Hank Hibler and audience demands, Charlene decides to have the three children perform increasingly dangerous stunts, and dresses them in elaborate outfits. Due to a growing awareness of how the cavelings are being mistreated, Charlene ultimately returns them to the wild, where they reunite with their mother.