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    PBS
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    In this activity, learners use a compass, powerful magnet, and copper magnet wire to build a special generator known as a dynamo. Learners observe what happens to the compass needle when the magnet...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    Community Science Workshop Network
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    In this activity, learners build a machine made of craft sticks to multiply the levering motion of their hands and create a device that bends and extends. Learners can decorate a pom pom creature...

    $1 - $5 per student Ages 6 - 14 1 to 2 hours
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    PBS
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    In this activity, learners make an electromagnet motor to demonstrate the most basic method of changing electrical energy into mechanical energy. This experiment relates to Nikola Tesla's work...

    $5 - $10 per group Ages 14 - 18 45 to 60 minutes
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    Museum of Science and Industry, Chicago
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    Learners attach an egg to a rubber-band bungee cord and drop the egg. By performing a few test drops with an egg and short bungee cord, learners are able to predict how long a bungee cord they...

    1 cent - $1 per student Ages 8 - 18 30 to 45 minutes