Claim: Sheds can be small open-sided tin-roofed structures, used for recreational activities.

A hobby is a regular activity that is done for enjoyment , typically during one 's leisure time . Hobbies can include collecting themed items and objects , engaging in creative and artistic pursuits , playing sports , or pursuing other amusements . A list of hobbies is lengthy and always changing as interests and fashions change . By continually participating in a particular hobby , one can acquire substantial skill and knowledge in that area . Engagement in hobbies has increased since the late nineteenth century as workers have more leisure time and advancing production and technology have provided more support for leisure activities . As some hobbies have become less popular , like stamp collecting , others have been created following technological advances , like video games .   Hobbyists are a part of a wider group of people engaged in leisure pursuits where the boundaries of each group overlap to some extent . The Serious Leisure Perspective groups hobbyists with amateurs and volunteers and identifies three broad groups of leisure activity with hobbies being found mainly in the Serious leisure category .   a. Casual leisure is intrinsically rewarding , short-lived , pleasurable activity requiring little or no preparation   b. Serious leisure is the systematic pursuit of an amateur , hobbyist , or volunteer that is substantial , rewarding and results in a sense of accomplishment .   c. Project-based leisure is a short-term often a one-off project that is rewarding .