Tenpin Bowling

Ten-pin bowling is a sport in which a player (called a "bowler") rolls a bowling ball down a wood or synthetic (polyurethane) lane and towards ten pins positioned at the end of the lane. The objective is to score the highest pinfall by knocking down as many pins as possible. Two finger holes and sometimes a thumb hole are drilled into a traditional bowling ball, and weights vary considerably to make the sport playable for all ages. For young children who like bowling, a ramp is often used. Source : https://en.wikipedia.org/wiki/Ten-pin_bowling