| My son is seven & lives with his mom, and I get him over here every other weekend. He plays absolutely no video games at his moms (because Dr. Phil said they're evil for the love of Pete), so it's a pretty big thing over here for him to play.
If he's just playing by himself, about an hour. What happens a lot though is we start gaming together & it can end up lasting a couple of hours.
I really don't think it's bad at all to let kids play games though - and I'm willing to bet everyone has allowed their kids to play longer than the "15 minutes a month" they always claim! It's only bad if that's all they do, you know? | 
