A hobby is a regular activity done for enjoyment, typically during one's leisure time, not professionally and not for pay. Hobbies include collecting themed items and objects, engaging in creative and artistic pursuits, playing sports, or pursuing other amusements. Participation in hobbies encourages acquiring substantial skills and knowledge in that area. A list of hobbies changes with renewed interests and developing fashions, making it diverse and lengthy. Hobbies tend to follow trends in society, for example stamp collecting was popular during the nineteenth and twentieth centuries as postal systems were the main means of communication, while video games are more popular nowadays following technological advances. The advancing production and technology of the nineteenth century provided workers with more availability in leisure time to engage in hobbies. Because of this, the efforts of people investing in hobbies has increased with time. According to the serious leisure perspective, a hobby is an enduring serious leisure pursuit having no significant professional counterpart and being too poorly remunerated to constitute a livelihood. Hobbyists are distinguished from Amateurs, who do have professional counterparts (e.g., professional actors, scientists, entertainers, athletes) and from specialized career volunteers with their interest in altruistically serving other people. In the 16th century, the term 'hobyn' had the meaning of 'small horse and pony'. The term 'hobby horse' was documented in a 1557 payment confirmation for a 'Hobbyhorse' from Reading, England. The item, originally called a 'Tourney Horse', was made of a wooden or basketwork frame with an artificial tail and head. It was designed for a child to mimic riding a real horse. By 1816 the derivative, 'hobby', was introduced into the vocabulary of a number of English people. Over the course of subsequent centuries, the term came to be associated with recreation and leisure. In the 17th century, the term was used in a pejorative sense by suggesting that a hobby was a childish pursuit, however, in the 18th century with a more industrial society and more leisure time, hobbies took on greater respectability A hobby is also called a pastime, derived from the use of hobbies to pass the time. A hobby became an activity that is practised regularly and usually with some worthwhile purpose. Hobbies are usually, but not always, practised primarily for interest and enjoyment, rather than financial reward. Hobbies were originally described as pursuits that others thought somewhat childish or trivial. However, as early as 1676 Sir Matthew Hale, in Contemplations Moral and Divine, wrote 'Almost every person hath some hobby horse or other wherein he prides himself.' He was acknowledging that a 'hobby horse' produces a legitimate sense of pride. By the mid 18th century there was a flourishing of hobbies as working people had more regular hours of work and greater leisure time. They spent more time to pursue interests that brought them satisfaction. However, there was concern that these working people might not use their leisure time in worthwhile pursuits. 'The hope of weaning people away from bad habits by the provision of counter-attractions came to the fore in the 1830s, and has rarely waned since. Initially the bad habits were perceived to be of a sensual and physical nature, and the counter attractions, or perhaps more accurately alternatives, deliberately cultivated rationality and the intellect.' The flourishing book and magazine trade of the day encouraged worthwhile hobbies and pursuits. The burgeoning manufacturing trade made materials used in hobbies cheap and was responsive to the changing interests of hobbyists. The English have been identified as enthusiastic hobbyists, as George Orwell observed. 'nother English characteristic which is so much a part of us that we barely notice it … is the addiction to hobbies and spare-time occupations, the privateness of English life. We are a nation of flower-lovers, but also a nation of stamp-collectors, pigeon-fanciers, amateur carpenters, coupon-snippers, darts-players, crossword-puzzle fans. All the culture that is most truly native centres round things which even when they are communal are not official—the pub, the football match, the back garden, the fireside and the 'nice cup of tea'.' Deciding what to include in a list of hobbies provokes debate because it is difficult to decide which pleasurable pass-times can also be described as hobbies. During the 20th century the term hobby suggested activities, such as stamp collecting, embroidery, knitting, painting, woodwork, and photography. Typically the description did not include activities like listening to music, watching television, or reading. These latter activities bring pleasure, but lack the sense of achievement usually associated with a hobby. They are usually not structured, organised pursuits, as most hobbies are. The pleasure of a hobby is usually associated with making something of value or achieving something of value. 'Such leisure is socially valorised precisely because it produces feelings of satisfaction with something that looks very much like work but that is done of its own sake.' 'Hobbies are a contradiction: they take work and turn it into leisure, and take leisure and turn it into work.' Hobbies change with time. In the 21st century, the video game industry is a very large hobby involving millions of kids and adults in various forms of 'play'. Stamp collecting declined along with the importance of the postal system. Woodwork and knitting declined as hobbies, because manufactured goods provide cheap alternatives for handmade goods. Through the internet, an online community has become a hobby for many people; sharing advice, information and support, and in some cases, allowing a traditional hobby, such as collecting, to flourish and support trading in a new environment. 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. Casual leisure is intrinsically rewarding, short-lived, pleasurable activity requiring little or no preparation. Serious leisure is the systematic pursuit of an amateur, hobbyist, or volunteer that is substantial, rewarding and results in a sense of accomplishment. Finally, project-based leisure is a short-term often a one-off project that is rewarding.