I found a website a while back by the name of 99 Designs. 99 Designs allows companies to put out ads for things such as small logos, Website designs, logos, t-shirts, and book covers. I will have a full list below. What happens is multiple people submit their designs or graphics and the company chooses the one that they like the most and the creator gets paid. I'm 16 and currently have over $20,000 in my bank account from multiple Website designs and small logos. Here is a list of some of the catagories and how much they pay at the minimum, remember the price almost never gets anywhere close to this, it is always much higher but varies with each consumer.
Website Design: $599<
Mobile App Design: $599<
Logo Design: $299<
Brochure Design: $299<
Book Cover Design: $299<
Post Card or Flier Design: $199<
Product Packaging Design: $199<
Business Card Design: $199<
Banner Ad Design: $149<
T-Shirt Design: $149<
Icon or Button Design: $149<
These all pay VERY well and if you are good at what you are doing then it's easy money so please, go check out 99 Designs!
Thanks to @Doc for allowing me to post this.