buy him a bottle so he can play spin the bottle and get him a head start on being cool.
hrm...in terms of video games? if you have playstation, I always enjoyed super puzzle fighter ... it was like tetris but with cute street fighter characters...you really don't want to get your kid a RPG type game because that would make him weird when he grows up (i am talking out of experience here)*... i REALLY have fun with counterstrike...but that might be too violent...starcraft/red alert 2 encourages strategy ...but that might be too complicated...11 is 6th grade so that should be fine

(sports/fighting games on pc are terrible...those belong on consoles)
*my sister is very popular here on campus and NOBODY knows that she is a ff7/chrono trigger person who also played more diablo than me

... this is an anomaly though...you know the dungeons and dragon types right? well its the same for RPGs.