Just doing the sums now:
we bought the dc an Xbox 360 two Christmasses ago, for about £250. Joint 'big' present.
So by this December, the actual console will have cost about a tenner a month between three of them, which in terms of play value is quite good.
That's without allowing for the hours dh spends on it when they're in bed. I did my gaming on a PS 20 years ago & have long since lost interest, apart from the occasional zombie shoot'em'up after a rough week at work
.
In fact, the kids have all agreed that they don't desperately want or need a new console this year (waiting for price to drop on Xbox 1), so it'll be down to about £7/month if it's another year until we upgrade. Less than a pound per child per week.
They each get a new game for birthday or Xmas, so another £30 or so, per child, twice a year - all other games are bought 2nd hand for pocket money or by trading in - so that costs us another £180pa altogether - say round it up to £1.50 a week each on games.
Their martial arts class is £7 each per week, & swimming lesson £6, so all told, we spend something like £2-3 each week on gaming for each child, & 5 times as much on physical stuff.
Gaming's cheap, really. It's not a massive priority in this house, & you could obviously spend far more, but it's quite possible for it to be very good vfm.