Making sounds with this paper device, kids will observe the changes in sound based on the size of the vibrations, similar to the way the rubber band on the harmonica works. The Paper Squawker activity offers similar noise-making STEM fun. Changing the amount of the rubber band that vibrates also changes the "pitch" of the sound (because the rubber band vibrates faster or slower, which changes the frequency of the sound wave). The sticks and straws harmonica doesn't get played quite the same way a real harmonica does, but through a series of experiments with the straws and the construction, students will see that the sound the harmonica makes is due to the vibration of a rubber band. But how? In the Make Your Own Harmonica! activity, students use craft sticks, straws, and rubber bands to make a very simple homemade harmonica. ![]() ![]() The harmonica is a small and compact instrument that people of all ages try (at some point) to play! Blowing into (or inhaling from) a harmonica's different holes changes the sounds (notes) that are created. (For a related informal science activity, see Make a Rubber Band Guitar.) Get inspired! See how this family experimented with a rubber band guitar and even added a guitar neck from a cardboard tube. Plucking a rubber band string makes it vibrate, which causes air molecules to vibrate, which results in a sound wave that travels to the ear and is interpreted by the brain as a sound. In the Sound and Vibrations 1: Rubber Band Guitar lesson, students make a simple guitar from a recycled box and rubber bands and explore how sound is caused by vibrations. Lesson Plans, Video Lessons, and STEM Activities to Teach About the Science of Sound Sound Waves and Vibrations Note: for more information about the various "types" of resources available, see Understanding Science Buddies' Resources.
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