I would have to say that the previous answer is wrong. The game is ok for a 12 year old but they have to understand it is not real. There is not much blood but a lot of cursing on the campaing and people can be very foul mouthed online.
no
You could but probably don't let her watch you play
Many already do so what's one more
I should say not, He/ She should at least 13 years of age
Yes you can
because it isnt that violent
yes
straight answer no it is rated as a M which is 17+ and a 18+ in the UK but in Australia it is rated as a 15+
No legally you must be 18 however there are allot of 11-14 year old's on the game, so i think it would be ok along as you don't let them stay on it all day.
NO as he shouldn't be playing ether game as he is under the age
It is actually up to that child's parents, but they are younger people playing the game and the age for AUS is only 15
Instead of playing Modern Warfare, you might want to hit the spelling books instead.