+1 on not forcing a hobby that you like on your son. He's not going to use it. He may just sell it, AND if that would happen, I'd buy him a 1DX. That way he'll have more $$$.
You're worried about him "just reading books", why is that bad? I think you should be happy he does like to. Too many of the young generation is caught up on playing games, smartphones, anything but something that educates. Find out what type/genre of books he really likes, and buy some for him.