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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 group activity, learners make multi-sided polygons with string. Learners slide a long piece of string through their fingers to make different kinds of triangles (isosceles, right,...

    1 cent - $1 per group Ages 8 - 11 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners work together to make polygons (many-sided shapes) with string. Learners sit on the floor and hold onto a piece of string slid between their thumbs and index fingers....

    1 cent - $1 per group Ages 4 - 8 30 to 45 minutes
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    Community Science Workshop Network
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    In this activity, learners construct a device that projects images onto a surface, so they can trace landscapes and other sights. The cardboard box camera captures the images using a mirror, holder...

    $10 - $20 per student Ages 8 - 14 1 to 2 hours
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    Colorado State University
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    This is a series of three quick science activities to do with a spoon, knife, and fork. In the first two activities, learners use the flatware to explore optics, mirrors, reflection, and distortion...

    free Ages 4 - 14 5 to 10 minutes
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    The Exploratorium
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    In this art meets science activity, learners pack silver, ball-shaped ornaments in a single layer in a box to create an array of spherical reflectors. Learners can use this as a tool to study the...

    $5 - $10 per student Ages 6 - 14 10 to 30 minutes
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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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    The Exploratorium
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    This resource contains several mini-explorations using a slide projector as a light source to investigate light and the properties of images. These activities can be used as a class demonstration...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    Optical Society of America
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    In this activity, learners use Jell-O to explore lenses. Learners cut Jell-O into convex and concave lens shapes and examine how light exits each lens in a darkened room. They compare the rounded...

    $1 - $5 per student Ages 14 - 18 30 to 45 minutes
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    New Jersey Department of Education
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    Learners demonstrate how water can distort, refract and magnify light. In an investigation called Underwater Differences, learners do activities including the Broken Pencil, examining how a pencil...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours