Color postcard showing Yogi Bear and Huckleberry Hound Kellogg's advertising characters in a drawn balloon floating over a photograph of the Kellogg Company plant, c. 1967. Caption on front: "We've just seen 'em make the World's Greatest Flakes!" Caption on back: Kellogg Company Battle Creek, Michigan The home of Kellogg's as it looks today. Since 1906, Kellogg's has been producing America's best like cereals. The world's largest manufacturer of read-to-eat cereals. Kellogg's has plants in the U.S. and throughout the world. Kellogg's the greatest name in cereals.