Windbags – Cool Science Experiment


How many breaths does it take to inflate an 2 meter (8 ft) Windbag? 70 breaths, maybe? Why even try? With a simple science secret you can amaze your students and friends by blowing up your Windbag in one breath! If you don’t believe it, try this amazing science activity! Windbags are so light and strong that even the smallest scientist can demonstrate the amazing properties of air!

About Steve Spangler?

Steve Spangler is a celebrity teacher, science toy designer, speaker, author and an Emmy award-winning television personality. Spangler is probably best known for his Mentos and Diet Coke geyser experiment that went viral in. Spangler is the founder of, a Denver-based company specializing in the creation of science toys, classroom science demonstrations, teacher resources and home for Spangler’s popular science experiment archive and video collection. Spangler is a frequent guest on the Ellen DeGeneres Show and Denver 9 News where he takes classroom science experiments to the extreme. For teachers, parents or DIY Science ideas ? check out other sources of learning:

Join the Science Club and check out other cool science experiments at –

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Attend a Spangler Hands-on Science Workshop for Teachers –

Watch Steve on Local and National Media Appearances on YouTube at:

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  1. Those "Diaper Genie" bags are expensive.
    I wish i could find garbage bags on a continuous roll, but every roll i see is already perforated into individual bags, grrr.
    Anyone got any suggestions?

  2. So…? This was a record of the most WRONG Bernoulli demos at one time.
    +Wiird0?had it correct a year ago…Entrainment.
    P.S. He doesn't need to hold the whole bag open as he does.? This is not a TRICK.? If the bag is fully deflated it works the same.? It's called ENTRAINMENT, NOT Bernoulli.
    And Fast air DOES NOT have a lower pressure. It can be measured and proven.
    Spangler normally has good demos and explanatinos, but NOIT THIS TIME…sorry.

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