" Children need practice dealing with other people. With people, practice never leads to perfect. But perfect isn’t the goal. Perfect is the goal only in a simulation. Children become fearful of not being in control in a domain where control is not the point. Beyond this, children use conversations with one another to learn how to have conversations with themselves. For children growing up, the capacity for self-reflection is the bedrock of development. I worry that the holding power of the screen does not encourage this. It jams that inner voice by offering continual interactivity or continual connection. Unlike time with a book, where one’s mind can wander and there is no constraint on time out for self-reflection, “apps” bring children back to the task at hand just when a child’s mind should be allowed to wander. So in addition to taking children away from conversation with other children, too much time with screens can take children away from themselves. It is one thing for adults to choose distraction over self-reflection. But children need to learn to hear their own voices. "

― John Brockman , What Should We Be Worried About? Real Scenarios That Keep Scientists Up at Night