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    Colorado State University
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    In this activity, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises. Learners can use a hair dryer to...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    This is an activity (located on page 3 of PDF) about composites, materials made of 2 or more different components. Learners will be challenged to build the best mud bricks, one of the earliest...

    $1 - $5 per group Ages 8 - 14 1 to 7 days
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    Kohl Children's Museum
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    In this activity, learners investigate and compare the rate of drying in different conditions. Learners place wet dish cloths in front of a fan, on a flat surface inside the room, in a box with a...

    $1 - $5 per group Ages 6 - 11 30 to 45 minutes
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    NOAA
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    In this activity, learners perform an experiment to learn about how different types of marine debris degrade and how weather and sunlight affect the rate of degradation. Learners discover that...

    $1 - $5 per group Ages 8 - 14 1 to 12 months
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    Kohl Children's Museum
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    In this activity, learners investigate how different materials repel or absorb water. Learners use spray bottles to explore how everyday items like sponges, cardboard, feathers, etc. respond to...

    $1 - $5 per group Ages 4 - 8 30 to 45 minutes

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