Humming Balloon

You can easily make a humming (or screaming!) balloon by inserting a small hexnut into a balloon and inflating. You can also try pennies, washers, and anything else you have that is small and semi-round. We have scads of these things at birthday time, hiding small change in some and nuts in the others so the kids pop them to get their treasures. Some kids will figure out a way to test which balloons are which without popping… which is what we’re going to do right now.

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One Response to “Humming Balloon”
  1. tsyed says:

    I really liked this experiment! I spun the nuts so fast my balloon popped!! So cool. Thanks.

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