ya thats cool if you want to do his own thing, plus hes kind of young, but i did that for most of my life (X-Box) but i wish i went camping more. I went camping when i was around 9-11 and i look back at those times, and every time i remember them, i start craving for a fire.
Dont push it on him but dont let him froget that outdoors is a option. he might be a late bloomer in the world of the outdoors. he might want to start camping at the age of 15, hell maybe 20. how ever long when he asks, do not say no.
EDIT: wow he got more knives than me!!! but i collect busses, so one of mine is all of his

but hes getting a .22! lucky

I recomend for his 13 b-day, becoming a teenage, get him a Busse Game Warden. i am 15 that is my favorite thing i own. i would trade my TV, PS2, X-box, and anything you can think of for that thing. best X-mas present ever!
to look at all of busse's knives go to
www.bussecollector.com. there expensive as hell but cant beat them. i know when i have a kid this will be his 2nd knife (first will be swiss army knife[thats what my first was]