Any good business ideas?

I'm 12 turning 13 soon, but I want to make some extra cash to buy an expensive airsoft gun and I've already got enough to buy it but my dad said it had to be hard earned cash. I'm a dude and I like cooking, I'm a good instructor, play ice hockey, scuba dive, I like hiking and backpacking, I'm pretty good with computers, I'm not into the lemonade stand kind of thing, I like to step it up a little bit more. So yea but if you cant decide about an idea then just give me something basic but not a lemonade stand! Yes... Thanks.