Rice Krispies are made of crisped rice (rice and sugar paste that is formed into rice shapes or "berries", cooked, dried and toasted), and expand forming very thin and hollowed out walls that are crunchy and crisp. When milk is added to the cereal the walls tend to collapse, creating the "snap, crackle and pop" sounds. Whether you're enjoying it by the bowlful or through the tempting taste of The Original Treats recipe, Kellogg's Rice Krispies cereal makes it easy to bring a little magic to your day.