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    The Exploratorium
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    Construct a simple battery that's able to power a small light or motor out of foil, salt water, and charcoal. A helpful video, produced by the Exploratorium, guides you along on this activity.

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    The Exploratorium
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    Make your own speaker with a magnet, wire, and paper cup! If you have a radio with a headphone plug and an old pair of headphones, this is a great tinkering activity.

    $1 - $5 per student Ages 8 - adult 10 to 30 minutes

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