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    The Exploratorium
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    In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment. In this modern, low cost version, a pair of learners try to pull apart two suction cups (dent...

    $10 - $20 per group Ages 11 - 18 10 to 30 minutes
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    New York Hall of Science
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    Take the two-straw challenge and discover how pressure affects vacuums! In this activity, learners experiment with drinking through one and two straws, comparing the amount of liquid they can drink...

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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    Iridescent
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    In this engineering design challenge, learners build an octopus-inspired suction pad that can grab an object and hold it tightly in the air. As learners work their way through the design process,...

    $5 - $10 per student Ages 4 - 18 1 to 2 hours
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    Twin Cities Public Television
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    This activity (located on page 3 of the PDF) is a full inquiry investigation into the forces of gravity and air pressure. Groups of learners will construct a simple gravity fountain by making a...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours