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    Omaha's Henry Doorly Zoo
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    In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution. Learners soak one regular hard-boiled egg and one peeled...

    1 cent - $1 per group Ages 4 - 14 4 to 24 hours
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    COSI
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    In this activity (page 13 of the PDF), learners discover how weathering and erosion change the Earth’s surface. By comparing sedimentary rocks subjected to various amounts of weathering, they will...

    $10 - $20 per group Ages 11 - 14 4 to 24 hours