"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. This pajama dress will have you saying Yabba-Dabba-DOOOOO! This Flintstones pajama dress features the two characters known as Pebbles and Bamm-Bamm in a heart with the phrase "Rock'n" beneath them. The dress features a classic crewneck neck, as well as a knee-length style. The pajama is a soft 100% cotton fabric blend. These are the best!