How can i make fast money legally

I need to make some fast money. Im 15. I want to do this legally, any tips?

You'll have to check the laws in your area - may require a permit..some ideas:

Baby sitting (only for persons that are trustworthy)
Chores for trustworthy neighbors
Car wash
Bake sale
Bus boy/girl
Store stocker
Paper route
Dog walking
Grocery store
Lemonade stand
Paint House number on street curb
House sitting
Message Delivery
Pharmacy Delivery
City, County, State and other government-run Youth Programs
Vacation and Tourism spots
Hotels/Resorts
Parks and recreational areas
Swimming pools, golf courses and campground facilities
Day and summer camps
Amusement/Theme/Entertainment parks
Museums, Zoos and Aquariums
Airport concession firms
Childcare and Eldercare providers
Health care facilities
Business services (including)
Moving and packing companies
Pool and spa companies
Lawn care and other maintenance companies
Construction companies
Movie theaters
Fast food and restaurant establishments
Ice cream parlors, juice bars
Clothing and accessory stores
Newspaper / Magazine Distribution

Legal Considerations:
Not many people are aware that they break the law when they work without fulfilling the basic requirements that involve teenage work. So let us see, what this is actually. Note this is not an exhaustive list and hence for accuracy you should check with your local guardian or legal advisor (at school or at any social center). Also be aware the each State Country may have different laws that cover teenagers working conditions.

Timings: Teenagers below 14 years old are usually not encouraged to work in offices. For those above 14 and above they should not be working at night. The legal hours are any time between 7 am to 7 PM ' of course ensuring that school is taken care of. Those between 16-19 years of age can be free to work as much and as long as they please. However, girls should always be wary and careful when working nights as crime increases at night.
Work areas: Teenagers may work anywhere they can be engaged with the exception of places where they could endanger themselves or others, such as construction sites, repair sites or garages, chemical and other types of processing, mining, messenger jobs, warehousing, adult clubs and bars.
Social security number: There are places where teens need a social security number to receive payment;
Taxes: Most of the time teen jobs do not involve tax payments and need not have any dedication in the paychecks. However, you need to consult the local IRS to ascertain this.
Each state and country has its own set of rules and what is valid in one may not be in another. Do not take anything for granted. Keep in mind that legal aspects are serious matters and you do need complication with the law. Check and be sure you fulfill all the legal formalities applicable for teenagers before you even apply for work. Ask the help of a responsible adult, such as your parents, teachers or relatives and seek out the correct answers - no such thing as a stupid question.

Wish you the best and always be alert, putting safety first !!