Share on Facebook
To play you must have at least two players, one Ref with a stopwatch, and a tennis ball. To play throw the ball in the air and have the Ref see how many seconds it stays in the air and then record how many seconds it stays in the air. Then let the other player have his\her turn, and do the same do this for however long you want to then add up the seconds, the player with the most wins.
Contributed by Marc - Thank you!