With a specific agenda of creating a fun activity that emphasized teamwork, cooperation, and sportsmanship, Mario Demers, a Canadian physical education professor, created Kin-Ball in the mid 1980s. The game involves three teams of four players each in which a large ball (4 feet diameter and 2.2 pounds weight (1.22 m and 1 kg, respectively) is sent into space so that one of the other designated teams cannot retrieve it before it touches the ground. The purpose of this study was to determine the amount of physical activity achieved during Kin-Ball play. The results showed that across all age groups and experience levels approximately 70% of game time was spent in moderate-to-vigorous physical activity (MVPA). Accumulated MVPA during Kin-Ball did not differ between gender and age. Previous scholarship on children and adolescent physical activity showed that gender was the most important demographic correlate of physical activity for this age group. (Contains 1 figure and 1 table.)