Seattle Sunshine, I think these are all excellent considerations, especially when managing long-term screen time policies. I guess my question was more geared toward what I think will be a short-term burst. DS has always gotten sucked into obsessive interests of one kind or another and will pursue them until he's suddenly "done" and moves onto something else. This usually takes 3 months or so and he gets some really in-depth knowledge of whatever it is. (In this case, I think he's learning to read and write.) The only reason I'm willing to tolerate as much screen time as he has had recently is because I think this is one of those interests, and it will burn itself out soon enough. We'll see...in the meantime, we have ratcheted down how much time he plays on weekdays.