Snap, Crackle and Pop the early 1990s, but later returned to their original elf-like form. Likewise, there was briefly a fourth gnome in the 1950s named Pow who represented the claimed explosive nutritional value of Rice Krispies. Leo Burnett Worldwide assigned Chicago-based cartoonist Don Margolis to do Snap, Crackle and Pop for the Rice Krispies boxes as well as other applications. Davidson Marketing also used him for their Rice Krispies assignments. Don did the three gnomes until the end of 1998. "Snap", "crackle" and "pop" are terms, based on the Rice Krispies mascots, used for the fourth, fifth and sixth time derivatives of position.
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.