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    The Exploratorium
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    Discover how a refracting telescope works by making one from scratch using common items. This telescope won't have a tube so the learner can see how an image is formed inside the telescope....

    $10 - $20 per group Ages 14 - adult 45 to 60 minutes
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    NISE Network
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    In this activity, learners investigate what happens when you build up static electricity on plastic balls. Learners discover that electrostatic forces cause smaller balls to suspend in a tube,...

    $10 - $20 per group Ages 4 - adult 5 to 10 minutes
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    Astronomical Society of the Pacific
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    This fun and simple hands-on astronomy activity lets learners imagine what would happen if our Sun were replaced with a black hole. Using a bucket with stretchy fabric over it, this activity allows...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes
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    Astronomical Society of the Pacific
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    This fun and simple hands-on astronomy activity lets learners experiment with marbles and weights to discover some basics about gravity and black holes. A key message of the activity is that space...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes