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    Optical Society of America
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    In this optics activity, learners discover basic lens-making techniques by using a tennis ball to make a lens out of ice. After the ice freezes, learners will use the lens to magnify images in a...

    $1 - $5 per student Ages 14 - adult 2 to 4 hours
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    The Exploratorium
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    In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water. Learners explore why the lens inverts images and also reverses the motion of...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    BioEd
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    In this activity related to microbes, learners use water drops and hand lenses to begin the exploration of magnification. This activity also introduces learners to the microscope. This lesson guide...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    American Museum of Natural History
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    In this three-part activity, learners conduct simple experiments to see how light refracts and reflects, and how colors of light affect what we see. Use these activities together or individually to...

    $5 - $10 per student Ages 8 - 18 45 to 60 minutes
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    Community Science Workshop Network
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    In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction. First, learners use relatively simple materials to construct...

    $5 - $10 per group Ages 8 - 18 1 to 2 hours
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    The Exploratorium
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    In this activity, learners explore how polarizing sunglasses can help diminish road glare. By rotating a pair of polarizing sunglass lenses or other polarizing materials, learners will discover...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    Community Science Workshop Network
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    In this activity, learners construct a device that allows them to view 2-D images in 3-D. These 2-D stereoscopic images are simply pictures of the same thing, taken from two positions some distance...

    Over $20 per student Ages 6 - 11 1 to 2 hours