Babysitting is the best job for a twelve year old
I really have no idea i think twelve is to young for a job that pays and even for a twelve year old to work how would they get there and back ? I don't think there Mom or Dad wants to take them everyday.
To be honest, its a one in a million chance that twelve a twelve year old can even get a job, let alone a good one. However, it sometimes depends. In order for you to find a job and a good one, you will have to have connections and know lots of people!
A very good sales person
A twelve year old can make money by selling things mostly or playing shows around town.
A job that pays well
actually, yes, you can. My sister is twelve and she is a paper-deliverer. Sure, it doesn't pay WELL, but if you start at 12 and earn 10 dollars every week until 18, you can have enough to pay for at least a year of college at a good school
baby sitting mowing lawns even a lemonade stand
surgeon
It can be a good job and it pays well. But it also depends on if you have the experience and if you can do a good job helping people. Good luck!
rocket scientist
This is a really good pay for such a young person! It can be good but also bad because of the substantial amount of money you are getting. Your job must be really good. Vet, Lawyer, Doctor? What to do with all that money!