If you’re concerned about your children spending too much time on their devices, or fretting about how you’ll keep them off their phones long enough to develop into well-adjusted adults, a new study suggest you may not have to worry too much. After speaking with parents of kids aged two to five in nearly 20,000 interviews, researchers from the Oxford Internet Institute and Cardiff University noted that limiting children’s screen time to one or two hours a day doesn’t have an effect on their psychological well-being.