the early years of TV, when variety-style programming was popular, jugglers were often featured; but developing a new act for each new show, week after week, was more difficult for jugglers than other types of entertainers; comedians and musicians can pay others to write their material, but jugglers cannot get other people to learn new skills on their behalf. The International Jugglers' Association, founded in 1947, began as an association for professional vaudeville jugglers, but restrictions for membership were eventually changed, and non-performers were permitted to join and attend the annual conventions. The IJA continues to hold an annual convention each summer and runs a number of other programs dedicated to advance the art of juggling worldwide. World Juggling Day was created as an annual day of recognition for the hobby, with the intent to teach people how to juggle, to promote juggling and to get jugglers together and celebrate. It is held on the Saturday in June closest to the 17th, the founding date of the International Jugglers' Association. Most cities and large towns now have juggling clubs. These are often based within, or connected to, universities and colleges. There are also community circus groups that teach young people and put on shows. The Juggling Edge maintains a searchable database of most juggling clubs. Since the 1980s, a juggling culture has developed. The scene revolves around local clubs and organizations, special events, shows, magazines, web sites, internet forums and, possibly most importantly, juggling conventions. In recent years, there has also been a growing focus on juggling competitions. Juggling today has evolved and branched out to the point where it is synonymous with all prop manipulation. The wide variety of the juggling scene can be seen at any juggling convention. Juggling conventions or festivals form the backbone of the juggling scene. The focus of most of these conventions is the main space used for open juggling. There will also be more formal workshops in which expert jugglers will work with small groups on specific skills and techniques. Most juggling conventions also include a main show (open to the general public), competitions, and juggling games. Popular forms Juggling can be categorised by various criteria: Professional or amateur Juggling up until the latter half of the 20th century has been principally practised as a profession. Since the 1960s, and even more so from the 1980s, juggling has also been practiced as a