1. Find a book/CD case and a piece of paper or a tennis racquet and a ball.
2. Put the crumpled up paper on the book/CD case or the ball on the racquet.
3. In 30 seconds, how many times you can touch the floor with the opposite hand whilst you balance the paper or ball?
4. Stand up and repeat.
5. If the paper or ball fall off then start counting again from 0.
6. Get someone else to time you for 30 seconds.
7. Submit your score as a round number, for example 30.