Fruity Pebbles and Cocoa Pebbles are brands of breakfast cereal introduced by Post Foods in 1971 featuring characters from the animated series The Flintstones as spokestoons. Cocoa Pebbles contains chocolate-flavored crisp rice cereal bits, while Fruity Pebbles contains crisp rice cereal bits that come in a variety of fruit flavors with a sugar content of 9 grams per serving for Fruity Pebbles and 10 grams per serving for Cocoa Pebbles. It is the oldest cereal brand based on characters from a TV series or movie.