If you're good enough to run pro classes you can. Also if you can run consistently in the top in the pro classes, you can pick up some local sponsorship to help with the expense of your racing.
if he mows lawns or shovels snow.
you can become a score keeper at your local ice rink. i hear you make good money, and you get to watch a bunch of games.
Delivering newspapers would be one of the best ones.
rake leaves
Most 13 year old boys will be able to mow lawns..place an ad in the newspaper.
630
Hard work
A bus boy typically doesn't make much money, but there are certainly exceptions. Say the bus boy had a second job owning Microsoft, he would make a lot of money.
Money
big boy
newspaper boy
mow neighbours lawns, wash their cars, shovel neighbours snow. Ask permission from parents first.