I really liked this article from Common Sense Media. A nice breakdown is given of the various categories of screen time ranging from passive viewing to content creation. The article also advises parents to monitor children after screen time to assess whether the results are positive or negative. My wife and I began doing this somewhat instinctively a few years ago when we noticed that after watching a movie the night before our two oldest daughters were far more likely to say they were bored or couldn't think of anything to do. This was unusual for them, as normally they would spend huge portions of each day involved in creative play, crafting, and doing activities like puzzles. We decided at that time to limit screen time as much as possible. Click the link below to read the article. LINK