Hobbies are something we enjoy doing in our free time for fun. It is often the case that we first become interested in something, and then we practise it ourselves. When we often do it or practise it for fun, it becomes our hobby.
Almost everyone has some kind of hobby. The choice of hobbies is different from person to person. It depends on one's own interests and jobs. People who sit at a desk all day long like to develop active hobbies while people like sports players like to take up quiet hobbies. Everyone should do something for a change so as to keep a balance between work and play.
People can choose hobbies that are very popular and easy to develop, such as watching TV, reading, window-shopping, going to the movies and so on. These hobbies need no special training. They can also choose hobbies that are not so easy to develop, such as painting, playing musical instruments, taking part in sports, etc. These hobbies need special training and talents.
Most people take up one hobby or another for relaxation while others, such as old people, have hobbies for killing time. However, students have to study. They have to finish a lot of homework, to take many exams and to fight for their future. But as the saying goes, "All work and no play makes Jack a dull boy. " Students need hobbies to refresh themselves in order to have better performances in their studies.