Step 1: Let's Get Started!
Cut a straw in half and glue each half on either side of the opening.
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Step 2: Guitar Strings
Place elastic bands around the box (lengthwise).
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Step 3: We've got music!
Listen to the vibrations of your rubber bands; do any sound like the wings of a hummingbird?
 Explanation
The rubber bands, like the strings on a guitar, vibrate and produce notes. On a guitar, each string has a different diameter: the thinner the string, the higher-pitched the sound. Guitar strings are not all made from the same material, most are made of nylon, and others are made of metal. The choice of strings determines the sound quality. Nylon strings produce a lower (more bass) sound and metal strings, a higher (more treble) sound.
Variation
Change the dimensions of the rubber bands and the box to produce different sounds. You can also try using wire made from iron or another metal.
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