In this science experiment we will explore sound, the laws of inertia, and centripetal force. In the
we will make some really cool sounds and create a balloon that screams! Your friends
will love it and your family will hate it.

Materials For Balloon Screamer:

  • Latex Balloon (clear works best)
  • 1/4 Inch Hex Nut

Watch The Balloon Screamer Video:

Process for
Balloon Screamer:

1) Insert  the 1/4 inch hex nut into the balloon.

2) Blow up and inflate the balloon with hex nut inside.

3) Tie off the balloon.

4) Grab the balloon by the top and begin to swirl the balloon in a circular motion.

5) Listen in amazement as it screams and makes cool sounds

The Science Behind Balloon Screamer

The hex nut spins rapidly against the inside of the balloon due to centripetal force. It races around
in circles because the centripetal force generates an inward pull on the hex nut against the inner
wall of the balloon. The law of inertia keeps the hex nut rotating inside the balloon in a circular
manner. Inertia says a body in motion (hex nut) will stay in motion until acted upon by an outside
force. If you stop spinning the balloon the force of gravity will eventually stop the hex nut from
spinning in a circular motion. The cool sound your hearing in created when the six sides of the hex
nut come in contact with the walls of the balloon very quickly over and over. This generates
vibrations along the inner latex wall of the balloon. Try experimenting with other objects inside the
balloon to see if you can create different kinds of sounds.
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