Kids ages 8–12 in the United States spend, on average, four to six hours every day watching or using screens, with teens spending up to nine hours. Screen time negatively affects children and adolescents in the following ways: increases childhood obesity; increases cardiometabolic disease—such as diabetes, hypertension, and heart disease; disrupts sleep; increases mental health […] Source: https://atoday.org/screen-it-out-kids-should-only-spend-2-hours-a-day-watching-screens/