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It’s Science!
Materials Needed: • Two popsicle sticks (Optional: painted color of choice) • Two rubber bands
• One strip of paper (cut to fit the width of the popsicle sticks) • One toothpick
Homemade Harmonica
Cut out a piece of paper so that it is the same length and width as your popsicle stick. Place the paper onto one of the craft sticks. Place the other popsicle stick on top and wrap one rubberband around one end. With the help of an adult: Cut your toothpick to the width of the popsicle stick. Put your cut toothpick between one of the popsicle sticks and the piece of paper, slide it down until it is next to the rubberband and then push it in so that none of it is sticking out. Put the other toothpick in the same position at the other end. Then fi nally wrap the fi nal rubberband around the other end.
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The Science Behind It When you blow into the harmonica you are causing the paper to vibrate. These vibrations need a medium like air in order to travel and produce the sound that reaches our ears. The frequency of this vibration is called the Hertz. The quicker it vibrates, the higher the pitch with be. If you squeeze the two sides of the harmonica together it will change the pitch of the noise produced.
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Source: http://www.mybaba.com/craft-stick-harmonica/
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