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    IEEE
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    In this activity, learners explore sensors and focus specifically on how to measure humidity using a sensor. Learners work in teams of "engineers" to design and build their own "...

    $10 - $20 per group Ages 8 - 18 1 to 2 hours
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    Discovery Education
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    In this activity, learners use pinecones to create a hygrometer, a device that measures the moisture content of the air. Learners discover that in dry air, pinecones open their scales to disperse...

    $5 - $10 per group Ages 4 - 14 2 to 4 hours
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    The Exploratorium
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    In this activity, learners hook up a hair to a lever system and create a hair hygrometer to measure changes in humidity. Learn the science behind bad hair days, and learn how hair increases its...

    $1 - $5 per group Ages 8 - 18 45 to 60 minutes