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    University of Washington
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    In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time. In order to explore the question, "Do people have built in...

    free Ages 8 - 18 30 to 45 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 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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