I'm guilty of letting my kids (DS4.5 and DS2.10) a lot of screen time all day ... from TV, Kindle apps, android apps, Leappad ... But they are both pretty good at just walking away from it on their own to find something else (like books, puzzles, pretend play) ... so as long as it's not the ONLY thing they want to do, I let them have it. It's the only time I can get anything done!