Today, an ultra-connected lifestyle is a reality: by 2025, every household in France will have more than ten digital devices. As a result, screens are a major part of the daily lives of children and teens: 3- to 5-year-olds spend 1 hour and 30 minutes a day in front of them, while 9- to 11-year-olds spend nearly 2 hours and 30 minutes. Social inequalities are pronounced: children whose parents have lower levels of education spend more time on screens and are more likely to have a screen in their bedroom. Social media use increases during middle school and is more prevalent among girls. Young people acknowledge their intensive use of these platforms but also find ways to manage their anxieties online. The impacts on physical health are now well documented: sleep disorders, sedentary lifestyles, and impaired vision. The effects on mental health are somewhat less well documented. Social media exploits adolescents’ vulnerability, risking drawing them into a spiral of addiction. From a very young age, screens disrupt the parent-infant relationship: this is known as parental “technoference.” However, studies put the impact of screens on children’s cognitive development into perspective, provided their use is supervised.This calls for collective and proportionate preventive measures, as there is no consensus on banning social media for children under 15 or cell phones in school. To ensure that children and adolescents are not left without safeguards when it comes to screen use, the challenge is to shift from a model of individual responsibility—which places the burden on families—to a collective approach that combines regulation of platform services with prevention and education. There are many possible courses of action. First and foremost, we must support families, for whom managing screen time has become the primary educational concern. Various tools are made available by nonprofit organizations and early childhood professionals. Media literacy education is essential for young people, as are initiatives—particularly in schools—that encourage them to disconnect. Local governments can also play a role, as exemplified by the “Growing Up Healthy with Screens” program offered by the city of Bordeaux to raise awareness among parents and provide children with cultural and sports activities—concrete alternatives to digital media.