Students will be blown away by your amazing lung power. The wind bag is an 8-foot plastic tube which with a little practice can be blown up with one breath. It demonstrates Bernoulli's principle and how air pressure changes help you blow up the bag. Made of durable plastic, this bag can also be used as an air lift. Elevate heavy objects by blowing up wind bags. These bags help explain some amazing, yet difficult-to-teach concepts.
How Airplanes Stay Aloft
“Blow away” the competition and inflate a windbag using Bernoulli’s principle and air pressure.
Flinn Catalog/Reference Manual Page 519
Flinn Middle School Catalog/Reference Manual Page 344