12/19/2023 0 Comments Twinkle twinkle little star xylophone![]() ![]() The pitch of the sound depends on the speed of the vibrations. When a mallet taps the glass, the water inside the glass vibrates. It was so fun! The Science Behind the Music The kids loved trying to figure out how to play simply melodies like “Happy Birthday” and “Twinkle Twinkle Little Star” on the water glass xylophone. It was interesting to notice how the pitch was slightly different with each kind of tap. They even had fun tapping them with their palms and fingernails. The kids tapped the glasses from the side and from the top. They came up with a hypothesis as they continued experimenting. I asked them to think about why this would be the case. They quickly noticed that the glass containing the most water produced the lowest pitch while the glass with no water in it produced the highest pitch. Wooden, metal, and plastic spoons were some of their favorite tools to use as mallets. They took turns using different tools to tap the glasses with. They were amazed to hear that each glass sounded different! The kids used a plastic spoon to tap on the glasses. By the time we were done we had a rainbow water glass xylophone! ![]() Once we measured water into each glass we used food coloring to dye the water all the colors of the rainbow: red, orange, yellow, green, blue, and purple. We decreased the amount of water by 1/4 cup in each glass, leaving the last glass empty. In the first glass we measured 1 3/4 cups of water, then 1 1/2 cups of water in the second glass, 1 1/4 cups of water in the third glass, and so on. 8 identical drinking glasses or mason jars.To begin, we gathered the following supplies: Making a water glass xylophone is so easy. Learn about how sound waves travel, how different pitches are produced, and have fun playing on your own homemade water glass xylophone musical instrument! Create your own rainbow water glass xylophone using a few simple supplies.
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