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    NISE Network
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    In this activity, learners find out why some mineral sunblock rubs in clear. Learners compare nano and non-nano sunblocks and discover how particle size affects visibility.

    $5 - $10 per group Ages 4 - adult 5 to 10 minutes
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    NISE Network
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    This is a hands-on activity exploring how nanoscale particles are used in mineral sunblocks to increase their transparency. Learners compare nano and non-nano sunblocks to a visual representation...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes
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    Mount Holyoke College
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    In this electrochemistry activity, young learners and adult helpers create a battery from a potato to run a clock. This resource includes background information about electricity, electronics, and...

    $5 - $10 per student Ages 4 - 8 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    Learners explore how recyclers take advantage of the different properties of materials, such as magnetism and density, to separate them from a mixture. They use a magnet and floatation to separate...

    1 cent - $1 per group Ages 4 - 14 Under 5 minutes
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    The Exploratorium
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    In this activity about chemistry and electricity, learners form a battery by placing their hands onto plates of different metals. Learners detect the current by reading a DC microammeter attached...

    $5 - $10 per group Ages 6 - 14 10 to 30 minutes
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    Lawrence Hall of Science
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    In this outdoor, night activity, learners track nocturnal animals' footprints, droppings and other signs of their presence. By setting out animal bait that has nontoxic, blacklight fluorescent...

    Over $20 per group Ages 6 - 14 1 to 7 days