Bowling is a very popular sport played worldwide. Bowling allows for the participation of both genders, all ages, skill levels, and classes, is affordable and encourages a social camaraderie rare in other competitive sports. In this sport players attempt to score points by rolling a bowling ball along a flat surface in order to knock down objects called pins. Most forms are played on a "lane", a flat surface made of wood or a synthetic imitation, which is several times longer than it is wide. Most forms of bowling may be categorized as either indoor or outdoor bowling. The main objective of the game is to knock out as many pins as possible in each turn. The player hold the bowling ball , which has generally two or more drilled holes in which to insert fingers for gripping the ball, throws it towards the pins. The bowling ball rolls down the slick lane and hits the pins knocking it down. In next turn, the player will try to knock out the remaining pins.