lendav_rott said:
He has no interest in what is so damn obvious to him. Who would? He needs a challenge, introduce him to chess, maybe that is what he likes.
+1 on both these points.
-> icrissy: In primary and high school I was intellectually quicker than most of the other kids, and tended to behave a bit like you describe your child. (I was never a genius, though.) University was therefore a dreadful shock, when there were suddenly
many people who were far smarter than me.
Being introduced to chess helped a lot, since it quickly became clear there were other people in the world who could beat me easily. So maybe consider a chess club, and junior tournaments? And for practice, even basic computer chess programs can thrash the average human these days. I enjoyed my first exposure to chess books which described standard tactical combinations and strategies applicable to various stages in a game.
Other possibilities are more advanced books on various subjects. My mother would buy me various volumes of "The How-&-Why Wonder Book of ...<insert subject here>...", and observe which ones I was more interested in reading. I gravitated towards science of course: chemistry, physics & dinosaurs.

(That particular example of a book series may or may not be the right level, or even still published, -- you've got to sense the response and maybe adjust to a more difficult level if appropriate.)
I loved my first chemistry set, although my mother
hated it when I became old enough in early teens to buy chemicals for myself and did experiments that stunk out the entire house. [There's a particular photographic chemical -- sodium thiosulphate, iirc -- that does truly wonderful things -- from a young boy's perspective -- when mixed with nitric acid. ] Eventually she got the shed down the backyard partially fitted out enough to serve as a "lab". (No, I never "cooked" anything illegal.)
About doing homework for regular school... dunno. I used to get in trouble (even caned) for not doing homework -- and then make top of the class in actual closed-book exams, surprising the teachers who didn't previously know me.