Kickball is a playground game and league game, similar to baseball, invented in the United States in the first half of the 20th century. It is similar to baseball where players kick the ball to bat it instead of using bats, making it more accessible to young children. As in baseball, teams alternate innings with one team attempting to score by having its players circle the bases and the other team in the outfield working to stop runs from being scored. Players on the batting team kick an inflated rubber ball to advance players around the bases and thus score runs. The team with the most runs after a predefined number of innings wins. Kickball is a popular playground sport and is typically played among young, school age children. The lack of both specialized equipment and highly skill-based positions makes the game an accessible introduction to other sports. It is less popular among adults, who are more commonly known to play similar games like softball and baseball.