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    Lunar and Planetary Institute
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    In this activity, learners drop impactors onto layers of graham crackers! The process models how impacts throughout the Moon's history have broken rocks down into a mixture of dust, rocks, and...

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes
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    Biotechnology and Biological Sciences Research Council
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    In this activity (p.3-4 of PDF), learners learn about disease transmission and antibiotic resistance. In this activity, an educator shows what could happen if one learner has not washed his/her...

    $1 - $5 per group Ages 8 - 11 10 to 30 minutes
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    University of Washington
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    This activity demonstrates the importance of wearing a helmet to protect the brain. An egg is used to symbolize a head with the shell as the skull and the inside of the egg as the brain. One egg is...

    1 cent - $1 per group Ages 4 - 14 10 to 30 minutes
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    University of Washington
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    In this activity (25th on the page) about learning and memory, learners explore a training method that animal trainers employ called "shaping." Working in pairs, learners will attempt to ...

    $1 - $5 per group Ages 8 - 18 10 to 30 minutes
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    COSI
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    In this yummy biology activity (page 3 of the PDF), learners participate in a demonstration of natural selection. By using a bowl of candy as a "population," students discover how...

    $5 - $10 per group Ages 11 - 18 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this online lemonade stand game, you decide how to price each cup of lemonade and how many pitchers to make. You play through 7 days and try to make as much profit as possible, subtracting the...

    free Ages 6 - 18 10 to 30 minutes
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    American Chemical Society
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    In this activity on page 9 of the PDF, learners test how flavoring extracts move through the walls of a balloon. Learners discover that the extracts' motion is similar to the way that oxygen...

    $5 - $10 per student Ages 8 - 14 10 to 30 minutes