As TV became a phenomenon and began to draw audiences away from movie theaters, many children's TV shows included airings of theatrical cartoons in their schedules, and this introduced a new generation of children to the cartoons of the 1920s and 1930s. Cartoon producer Paul Terry sold the rights to the Terrytoons cartoon library to television and retired from the business in the early 1950s. This guaranteed a long life for the characters of Mighty Mouse and Heckle and Jeckle, whose cartoons were syndicated and rerun in children's television programming blocks for the next 30 to 40 years.