Science Buddies
Science Buddies: Under Pressure: Ball Bouncing Dynamics
Many sports use a ball in some way or another. We throw them, dribble them, hit them, kick them, and they always bounce back. What makes a ball so bouncy? In this experiment you can investigate the effect of air pressure on ball bouncing.
Education.com
Education.com: An Air Science Experiment
[Free Registration/Login Required] With three simple items (ball of paper, 2 liter pop bottle & hair dryer) you can demonstrate the reality of air pressure. This experiment is user friendly.