As a teenager you like Part Time Jobs for A) a fair amount of spare time, and B) a desire to earn money. As described in Chapter 1 of The Teenager's Guide to the Real World, money gives you freedom. By working to earn money yourself, you can learn a lot about the value of things as well as the world of business.
To earn money by Part Time Jobs, one option you have is to go get a job. Typical and obvious jobs for teenagers include:
1)working at a fast-food restaurant
2)working as a clerk in a store
3)working as a bag boy at a supermarket....etc
What you get out of a Part Time Jobs like this depends on your attitude. If your attitude is, "I hate this job," then obviously you will get nothing out of it.If, on the other hand, you look at your job as an opportunity to learn how a business works from the inside out, then you can get a lot out of it. Many of the millionaires in this country, for example, are owners of franchise and private restaurants. Many of them learned how to run a restaurant by working in a restaurant.
Owning a restaurant is not easy, It requires quite a bit of knowledge and skill to be successful. Start gathering the knowledge and skill as a teenager by working in a restaurant as Part Time Jobs. Try as many positions as possible and ask lots of questions about cash flow, staffing, inventory, etc. Also keep in mind that there are lots of different kinds of restaurants: fast food, family dining, elegant dining, etc. They pay differently and appeal to different people. Look around at the options before making up your mind.