Photography.
But the line is so blurred these days i am not sure if it is still a hobby or a job.
I still shoot for fun but mostly I shoot for clients of late.

Or if you are not a retard, Photography, another one that I dont think has been mentioned... Home improvements/decorating (if you have your own place) very time consuming and you will have a sense of accheivement once you are finnished, then start again
Learn a language. Spoken or computer.

Mine is 3D printers, I have 2 of them now.
This is my first one, it's had a lot of upgrade since I shot this video:
, I'm currently doing an A-level at home and an apprenticeship so anymore educational type of things I'll pass on, but liking some of the ideas, will give a few ago and see where that takes me haha, i may be back here asking again due to trying then failing!
