ok so i bought an xbox 360.....

[plthijinx]

for my son for xmas. i'm definitely buying him halo 2 but want to get a few more as well. i have absolutely no idea what. i'd seen halo back when it came out and liked it then. but that was then this is now. keep in mind trevor is 10 so i'd like to keep it somewhat on the good side. i am tempted to go get call of duty for him but i know, i know, he's 10. comparatively speaking, what is available football-wise? i can google and find out but i want people i know and trust opinions. doesn't have to be football either. any and all suggestions are welcome.