At 14, Will Keith Kellogg sold brooms for his father's broom business. Later, he worked with his brother, Dr. John Harvey Kellogg, at the Battle Creek Sanitarium. In 1894, John and Will developed a successful cereal flake that they first served to patients at the sanitarium. In 1906, John launched his own food company to sell his Toasted Corn Flakes cereal. If all of the Kellogg's cereal boxes consumed since 1906 were placed side-by-side, they would ring the earth more than 3,000 times.