abba Dabba Doo! With the delicious Post Cocoa Pebbles, real Flintstones fans will fall into enthusiasm. "Pebbles" means pebble and is also the name of Fred Flintstone's little daughter. The delicious cereals were prepared from rice and refined with a large portion of cocoa. Enjoy the gluten-free flakes best with fresh milk and look forward to a successful start to the day.