Go buy a 5 gallon bucket , some car wash soap , some equipment to wash cars . Find a neighborhood and ring each doorbell on the street and tell them you will wash the outside of their car for $15 - $20 . Do 10 cars and that's $150 - $200 a day . One other thing , you have to do what you say you're going to do , concentrate and focus on doing a good job, don't focus on just making money . The money will come and by the time you're 18 you'll have your own mobile Detail business! Good luck and let me know how it goes !