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    COSI
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    In this physics activity, learners will investigate the strength of egg shells. They will attempt to stack books on top of inverted half egg shells to see how many they can hold, and the results...

    1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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    COSI
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    In this yummy chemistry activity which requires adult supervision, learners use sugar and water to explore how crystals form. The best part about this activity, other than witnessing really cool...

    1 cent - $1 per student Ages 6 - 18 1 to 7 days
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    Oregon Museum of Science and Industry
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    In this hands-on activity (on page 2 of the PDF), learners experiment with lemon juice and paper to create a message that can only be revealed using chemistry. Using an oven as a heat source ...

    1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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    BioEd
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    In this environmental health activity, learners grow and observe bread mold and other kinds of common fungi over the course of 3-7 days. This lesson guide includes background information,...

    1 cent - $1 per group Ages 8 - 14 1 to 7 days
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    COSI
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    In this physics activity (page 14 of the PDF), learners gain a better understanding of how friction and mass affect objects by comparing the rotational inertia of raw and hard-boiled eggs. Although...

    1 cent - $1 per student Ages 11 - 14 10 to 30 minutes
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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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    American Chemical Society
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    In this activity, learners heat and cool carbonated water to find out whether temperature has an effect on how fast the dissolved gas leaves carbonated water. Learners design their own procedure,...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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    American Chemical Society
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    Learners see that a carrot slice sinks in fresh water and floats in saltwater. Considering the placement of the carrot slice in water and saltwater, learners infer that the density of salt water...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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    American Chemical Society
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    Learners mix a variety of substances with red cabbage juice. The juice changes color to indicate whether each substance is an acid or a base. Learners can follow up their study of acids and bases...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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    American Chemical Society
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    Learners use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid. Use this as a follow-up...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes