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    The Exploratorium
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    This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match. Although this is a perception activity, it also...

    free Ages 6 - 18 5 to 10 minutes
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    American Museum of Natural History
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    In this experiment, learners work in teams to investigate how the color of a surface influences its ability to reflect light and therefore heat. The ratio of light reflected to that received is...

    $1 - $5 per group Ages 11 - 18 45 to 60 minutes
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    NISE Network
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    In this activity, learners create a colorful bookmark using a super thin layer of nail polish on water. Learners discover that a thin film creates iridescent, rainbow colors. This is a very fun and...

    $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, nighttime hands-on astronomy activity lets learners explore how long it takes for light from different objects in the universe to reach Earth. The activity shows participants the...

    1 cent - $1 per group Ages 8 - adult 1 to 2 hours
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    Make
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    In this activity, learners use a laser pointer to project a microscopic image of a liquid sample suspended from the tip of a syringe. This activity includes step by step instructions with helpful...

    Over $20 per group Ages 14 - adult 30 to 45 minutes
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    NISE Network
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    In this activity, learners discover that nanoparticles of gold can appear red, orange or even blue. They learn that a material can act differently when it’s nanometer-sized. Use this activity to...

    Over $20 per group Ages 4 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light. Learners discover that some chemical reactions release energy in the form of light, and...

    $1 - $5 per group Ages 4 - adult Under 5 minutes
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    The Exploratorium
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    In this activity, learners explore liquid crystals, light and temperature. Using a postcard made of temperature-sensitive liquid crystal material, learners monitor temperature changes. By observing...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    The Exploratorium
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    Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.

    1 cent - $1 per student 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 illustrates the path of light as it reflects off of mirrors and how this is used in telescopes. Learners will explore how a telescope works, why the...

    $5 - $10 per group Ages 6 - adult 5 to 10 minutes

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