By the 1920s and 1930s, child labor laws and other social reforms were resulting in increased numbers of children attending school. As the amount of time spent at school increased, people began to see adolescence as a distinct life stage, with its own “youth culture”. With increased urbanization and use of cars, there were new options for after-school socialization, some of which were less supervised and allowed for contact across social, class, and gender lines. Teachers and post-depression parents worried that children would get into trouble after school and began to start after-school clubs. Scientific educational toys were produced and promoted to kids as fun, and to parents as keeping kids out of trouble and encouraging them to enter well-paying careers in science. Chemcraft specifically used the slogan “Experimenter Today . . . Scientist Tomorrow” to market their chemistry sets.