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June 24, 2015

Media Object: Science Snack: Groovy Sounds

Get into the groove by making your own simple record player. Once you're finished explaining to the kids what a record is, you can use a pin, a pencil, and a sheet of paper to make a simple record player that actually works. (Caution: this activity might ruin your albums for future hi-fidelity use.) How does it work? Records contain analog sounds encoded and etched into their vinyl. A needle or pin placed in the groove of a spinning record will vibrate due to the bumps and curves it encounters as the disc moves under it. Paper shaped into a cone can act as a sounding board for the pin, so you can hear the sounds on the album as you turn it.