It depends on the laws in your area. You're probably too young to babysit, but you may be old enough to have a paper route. You could make some flyers to give to your neighbors that you'd like to earn money doing odd-jobs like raking leaves, cleaning snow (if you live in an area like that), washing cars, weeding a garden, walking a dog or see if people would be willing to donate their deposit bottles. (My son made money collecting bottles that people threw on the side of the road etc). If you're crafty/creative, check for upcoming craft fairs and see if you could share a table with someone and sell some things you've made like Christmas cards, ornaments, etc.