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    University of Washington
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    In this activity, learners investigate color vision as well as plan and conduct their own experiments. In "CLASS EXPERIMENT," learners discover that afterimages occur because of...

    $5 - $10 per group Ages 8 - 18 1 to 2 hours
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    Community Science Workshop Network
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    In this activity, learners construct a projector out of cardboard to view their favorite images (such as storybook illustrations) on the wall. Use this activity to introduce learners to concepts...

    $10 - $20 per student Ages 8 - 14 1 to 2 hours
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    American Physical Society
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    Learners shine the light of a laser pointer through sheets of fabric that all have a different number of threads per inch. By looking at the patterns created, learners calculate the wavelength of...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes
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    American Physical Society
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    Learners experiment to see which colors of light will cause a phosphorescent (glow-in-the-dark) material to glow. Different colors of light have different wavelengths, and different amounts of...

    $10 - $20 per group Ages 11 - 14 10 to 30 minutes
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    American Physical Society
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    In this activity on page 13 of the PDF, learners use a laser pointer (with known wavelength of light) to measure the thickness of a human hair. By shining the laser on a hair, analyzing the...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes
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    American Physical Society
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    Learners experiment with water gel crystals, or sodium polyacrylate crystals, which absorb hundreds of times their weight in water. When in pure water, the water gel crystals cannot be seen....

    $5 - $10 per group Ages 11 - 18 45 to 60 minutes
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    American Physical Society
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    Learners examine the properties of light by experimenting with an LED-flashlight and polarizing filters. When two polarizers are used, they block all light when they are placed at right angles....

    $10 - $20 per group Ages 11 - 14 10 to 30 minutes
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    American Chemical Society
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    In this activity on page 8 of the PDF (Behind the Scenes with Chemistry), learners make three of Harry Potter's essential school supplies: quills, ink, and color-changing paper. Learners use...

    $10 - $20 per student Ages 8 - 14 1 to 7 days