"They're the Modern Stone-Age Family" Just those words will prompt viewers of a certain age to join in singing the show's catchy theme song. This all-time classic cartoon revolved around a stone-age family, The Flintstones, Fred, Wilma, Pebbles, and Dino the Dinosaur. These pajama pants will have you saying Yabba-Dabba-DOOOOO! These The Flintstones pajama sleep pants feature several of the "The Flintstones" characters including Fred Flintstone, Barney Rubble, Bamm-Bamm Rubble, Pebbles Flintstone, Betty Rubble, Dino, and Wilma Flintstone. The pants themselves are made of a soft 60% cotton and 40% polyester fabric blend, for casual wear and lounging about!