Floating Ping Pong Ball 🏓 age 4-8 🏓 For this experiment you will need a hair dryer and a ping pong ball. Point the hair dryer up and turn on the highest setting (but use warm or cool air). Place the ping pong ball over the dryer and notice how it appears to float above the dryer even when you move the dryer around. This is because the hair dryer produces a column of quick-moving air with lower air pressure and the surrounding air with higher air pressure holds the ball in place. So cool! 👍🏻 As with any electric device, adult supervision is required and keep away from water.