Jesus 10 years old, thats a bit bloody late if you ask me, as soon as my kids were weened off their mama's tit I introduced them to the principle of the Head Shot and how to use mouse look, hell even my cat dabbles in a bit of CSS from time to time.
btw. I only have 1 steam account, so when you see me playin shit, it aint me its either one of my kids or even my cat.