I really feel at the moment that the screens have taken over our lives. We have collected an xbox, ps3 and tablets over the years, as well as a PC. My Y7 DS has drifted from one to another this year and not really put in much effort at school. He claims none of his friends are restricted and just go on screens all day (I know I shouldn't take this as gospel truth but last time we had an 'all my friends do it' type discussion it was about Call of Duty and it turned out all of the 8 and 9 years olds DID actually play so I lost the moral high ground there).
My Y5 DS is just copying his brother and goes on screens a lot too, but is doing very well at school so I can't claim he should have worked harder. But his behaviour is more affected by losing his game.
I have tried to just leave it and not nag, but they are utterly unable to self-restrict and just stay on screens for hours at a time. I am very uncomfortable with how much they are on screen, but I don't know if I am being old-fashioned (old gimmer - all we had was a TV and I was not allowed to watch during the day!) So I guess I am asking what do your children do all day in the summer? And how much screen time do you allow?