Animation on television focused almost exclusively on children, and the tradition of getting up early to watch Saturday morning cartoons became a weekly ritual for millions of American kids. The networks were glad to oblige their demands by providing hours-long blocks of cartoon shows. Hanna-Barbera Productions became the leader in the production of TV cartoons for children. A number of other studios produced TV cartoons, such as Filmation ("Fat Albert and the Cosby Kids", "The Archies") and DePatie-Freleng Enterprises ("The Pink Panther"), but Hanna-Barbera had developed a virtual lock on Saturday morning cartoons by the 1970s. Such critics of Hanna-Barbera's style of limited animation as Chuck Jones referred to it disparagingly as "illustrated radio," yet when one show was cancelled, the studio usually had another one ready to replace it because they were so cheap to produce.