Long before activists raised concerns about the dangers of commercials airing during Saturday morning cartoons, America's young people emerged as a group that businesses should target with goods for sale. As print culture grew rapidly in the nineteenth century, enterprising publishers raced to meet the widespread demand for magazines aimed at middle- and upper-class children, especially those whose families had leisure time and cultural aspirations to gentility. Advertisers realized that these children represented a growing market for more than magazines, and the editors chose stories to...