Air Ball has been a sport among the Air Nomads for centuries. Thanks to Aang, Tenzin and other airbenders, the game has survived to this day. It is played with a hollow wooden ball on top of wooden poles. Players must use airbending to fire the ball to ricochet into the poles and enter the other team's goal. It is a game of speed,agility, dexterity and balance and due to this nature non-airbenders will have a hard time playing the game.
More on the game can be seen here.