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    Arizona Science Center
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    In this activity, learners explore how molecules must fit together, like a lock and key, in order to identify each other and initiate a new function as a combined unit. By fitting their hands into...

    $1 - $5 per group Ages 8 - 11 45 to 60 minutes
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    Arizona Science Center
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    In this activity, learners explore how molecules self-assemble according to forces of attraction and repulsion. Learners investigate how the placement of charge determines the possible structures...

    Over $20 per group Ages 11 - 14 45 to 60 minutes
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    University of Washington
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    In this activity (15th activity on the page) about the sense of touch, learners use glue and cardboard to construct a maze they use with their eyes closed. Learners rely only on their fingertips to...

    1 cent - $1 per student Ages 4 - 14 30 to 45 minutes
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    University of Utah
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    In this activity, learners use pedigree and jigsaw puzzles to explore how scientists use genetic information from a family to identify a gene associated with a genetic disorder. This activity will...

    free Ages 11 - 18 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners model directed evolution by making paper fly. Learners construct and fly paper airplanes. During the first round, they calculate the average distance the planes fly and...

    $1 - $5 per group Ages 8 - 18 45 to 60 minutes
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    University of Washington
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    In this activity, learners make a Benham Top to explore visual illusions and optics. This activity guide includes three different instructions for making the spinner using various recycled...

    $1 - $5 per student Ages 8 - 18 30 to 45 minutes
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    University of Washington
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    In this activity, learners investigate visual perception as well as plan and conduct their own experiments. In "CLASS EXPERIMENT," learners discover how depth perception works by testing...

    1 cent - $1 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 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
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    WGBH
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    In this activity, learners make an optical illusion toy from the 1800s to explore persistence of vision. When you spin the Thaumatrope, the pictures move so quickly that your eyes and brain can&...

    $1 - $5 per student Ages 6 - 11 5 to 10 minutes
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    University of Washington
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    In this activity (7th activity on the page), learners use their sense of hearing to find a "sound match." Learners shake containers filled with items like dry seeds, sand, beans, etc. and...

    $1 - $5 per group Ages 4 - 14 5 to 10 minutes

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