Rice Krispies when milk is added to the bowl. The onomatopoeic noises differ by country and language: In 1938 and 1939, Vernon Grant, the illustrator who created Snap, Crackle and Pop!, produced a set of six illustrations of Mother Goose themes including Humpty Dumpty, Jack and Jill, Jack Be Nimble, Little Jack Horner, Peter Peter Pumpkin Eater, and Twinkle Twinkle Little Star that were offered as premiums in exchange for two Rice Krispies boxtops and a three-cent stamp. In 2004 packets of Pop Rocks were packed inside specially marked boxes of Rice Krispies. Television commercials showed the candy exciting Pop!, who shouts
Rice Krispies sold in the past. An extremely sweet, artificially-colored cereal, Razzle Dazzle Rice Krispies, was sold from late 1997 to 1999. Apple Cinnamon Rice Krispies, a cereal flavored with apple and cinnamon, was sold in the early 1990s. Also discontinued are Rice Krispies with berry flavors, including Berry Krispies and Berry Rice Krispies. In the late 1990s, Rice Krispies with honey, Honey Rice Krispies, was sold in the U.K. and Canada for a short period of time. In the late 1990s, Kellogg's sold Halloween versions of their regular cereal. This included Halloween Rice Krispies which featured a variety of orange krispies.