A hobby is a regular activity or interest that is undertaken for pleasure, typically
    done during one's leisure time. Examples of hobbies include collecting, creative
    and artistic pursuits, making, tinkering, sports and adult education. Engaging in
    a hobby can lead to acquiring substantial skill, knowledge and experience. People
    also enjoy participating in competitive hobbies such as athletics, hockey, curling,
    golf, bowling and tennis.
What are hobbies for some people are professions for others. For example, a chef
    may enjoy playing computer games as a hobby, whilst a professional game tester might
    enjoy cooking. Generally speaking, the person who engages in an activity for fun,
    not remuneration, is called an amateur (or hobbyist), as distinct from a professional.