Freelancing for students

Now in every country freelancing is the number one choice to young guns. They like it to do, cause they need to earn money. But, how it is possible to them? It's possible only doing freelancing. It's needed only one PC and a Internet connection. One users can do freelancing from anywhere. Suppose if anybody goes to other country or other city he can do this. That means it's very easy to do. Worker can do this from any place, they don't need to go any office, so that they like it.