This game needs a group of kids and a ball that can be easily thrown and caught.
One person is the thrower and stands at one end of the playing field. Everyone else waits at the other end of the playing area (throwing distance away from the thrower).
The thrower tosses the ball in the air towards everyone else and annouces a number between 50 and 200. If a kid catches it they get as many points as the thrower yelled. If the ball is missed or dropped, that person loses the same number of points (negative score are possible). The first person to get 500 points wins and become the thrower for the next game.