Air horns are extremely loud. That's why they're used by truck drivers, fire trucks and ambulances to clear the way in a hurry. This video will show you how to make your own air horn, using stuff you've probably already got in a junk drawer.
Materials needed:
A balloon
Rubber bands
A pill bottle with a hole in the cap and bottom
A straw
1. Cut two pieces from the balloon and stretch them across the top and bottom of th pill bottle, securing them in place with the rubber bands.
2. Make a hole through the balloon on the bottom of the bottle, just big enough to insert the straw through.
3. Make a hole in the side of the bottle.
4. Blow through the straw to make a terrible racket.
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