There are many different kinds of sports that are undertaken by a wide variety of different people. Some people do sport for their career and other people purely do sport for enjoyment and recreation. Some sports, like cricket, require the use of a lot of equipment, while others need very little in order to successfully play a game in that sport.  Some people use public playing fields to play sport for free, while other sports such as squash, tennis, badminton and table tennis are usually paid for on an hourly basis in the comfort of a local leisure centre. 

Most sports are played with a round object often known as a ball. Some sports use more than one ball and snooker is one of the unique sports that make use of a number of balls while being played. The game itself is often controlled by an impartial individual known as an umpire in cricket and a referee in sports like football and rugby. Most sports have a duration of not more than a few hours, however some athletic tournaments can last for up to a week and a game of cricket can be five days in duration before a winner is announced.