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    In this activity, learners discover how sweating makes us feel cooler. Learners put on one damp sock and one dry sock and sit in front of a fan. As the water in the damp sock evaporates, it makes...

    free Ages 4 - 14 5 to 10 minutes
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    In this activity, learners discover that it is difficult to trace a curve by using its reflection in a mirror. Use this activity to discuss how the brain works.

    1 cent - $1 per student Ages 6 - 18 5 to 10 minutes
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    In this activity, learners capture and observe planaria, which are worms that eat tiny pond critters. Use this activity to discuss the diversity of life forms present in different habitats like...

    $1 - $5 per student Ages 4 - 18 10 to 30 minutes
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    In this activity, learners discover how hard their hearts work to pump blood. Learners hold one hand above their head and one hand by their side for sixty seconds, and then compare the color of...

    free Ages 4 - 14 Under 5 minutes
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    In this activity, learners use plastic tubing and a funnel to listen to their heart. Learners also discover that if they run around, their heart pumps harder and faster, making it easier to hear....

    $1 - $5 per student Ages 4 - 14 5 to 10 minutes
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    In this activity, learners discover a brain process called habituation. Learners try to touch the tips of their socks with their eyes closed, and discover it is easier to do immediately after they...

    free Ages 6 - 18 10 to 30 minutes
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    In this activity, learners explore the behavior of cold-blooded animals. Learners discover what happens when they change a fly's temperature. Young learners would enjoy this activity, but...

    $1 - $5 per group Ages 4 - 14 45 to 60 minutes
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    In this activity, learners build an instrument for catching and observing flies. Learners act as entomologists, attract flies into a jar using a slice of apple, and then observe the flies'...

    $1 - $5 per group Ages 4 - 18 1 to 4 weeks