When I was a child in small-town West Virginia, there weren’t many options for entertainment after school or on weekends: I could walk to a friend’s house. I could watch TV on our 13 fuzzy channels. Or I could read. And so I read, and read, and read—hours and even whole days would pass with no interruptions. I didn’t have any choice but to concentrate.

Source: How to Help Kids Concentrate in the Era of Digital Distraction

Some great tips on limiting screen time. The article also links to the research on what is screen time, what is high quality screen time, and what can be done about screen time.