- The Flintstones Fruity Pebbles tastes like a bowl of noisy fruit, Fred. - Yeah, and Cocoa Pebbles taste cocoa-mocoa good. - If you put sweet pebbles in your mouth, you'll never have rocks in your head. Narrator: There's cardboard Flintstones checkers inside Fruity Pebbles and cardboard Flintstones Tic-Tac-Toe markers inside Cocoa Pebbles. Play checkers and Tic-Tac-Toe. A Tic-Tac-Toe or checkers board on the back of each specially marked box of Fruity Pebbles or Cocoa Pebbles.