Why don't you go to your local newsagent and ask about paper round vacancies. That might not be good money, but its something. good luck, but you are a bit young to be working yet, why not concentrate on your studies and help out at home for a bit of extra pocket money, (you can do my ironing!) :-) just kidding.
There's not alot you can do at 14, you are legally only allowed to work a few hours a week whilst you are at school, if I were you i would sort out an ebay account with a parent or responsible adult and start selling stuff.