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    Twin Cities Public Television
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    In this quick activity (page 1 of the PDF) about sound vibrations, learners will investigate which small objects, such as coins, hex nuts, or marbles, produce the loudest “screams” when swirled...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    Science Museum of Minnesota
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    Make a one-string "guitar" by stringing a cup with some fishing line. You amplify the plucking of the string by placing a piezo contact microphone and mini battery powered amplifier...

    $5 - $10 per student Ages 6 - 18 1 to 2 hours
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    WGBH
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    In this simple and fun activity, learners discover the relationship between vibration and sound by making a squeaky toy instrument out of simple household materials. Participants explore how...

    1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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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