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    The Exploratorium
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    With a bit of PVC, a laser, a can/cup, and a small mirror, you can make a device that visualizes you voice or any sound transmitted into the cup/can. Make beautiful patterns on a white wall as you...

    free Ages 8 - adult 10 to 30 minutes
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    Colorado State University
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    This is a series of three quick science activities to do with a spoon, knife, and fork. In the first two activities, learners use the flatware to explore optics, mirrors, reflection, and distortion...

    free Ages 4 - 14 5 to 10 minutes
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    Science Museum of Minnesota
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    In this interactive game, learners compare their music-listening skills with that of a three-month-old baby. This game challenges learners to listen to pairs of tunes and detect whether their...

    free Ages 6 - adult 5 to 10 minutes
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    WGBH
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    String Thing is an interactive online game in which learners change a virtual string's tension, length, and gauge to create different musical pitches. Educators can use this game as an...

    free Ages 8 - 14 10 to 30 minutes
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    Computer Science Unplugged
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    In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video. This is an...

    free Ages 6 - 18 30 to 45 minutes
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    NOAA
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    In this activity, learners will listen to as many radio stations as possible to discover that AM radio signals can travel many hundreds of miles at night. Learners log the call signs, locations,...

    free Ages 8 - 18 1 to 2 hours