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    Twin Cities Public Television
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    This is an activity (on page 2 of the PDF) about the two main components of bone - collagen and minerals (like calcium) - and how they each contribute to its flexibility and strength. Learners will...

    $5 - $10 per group Ages 8 - 14 1 to 7 days
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    The Exploratorium
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    In this activity, learners explore chemiluminescence and fluorescence. Learners examine 3 different solutions in regular light, in the dark with added bleach solution, and under a black light. This...

    $10 - $20 per group Ages 8 - 18 30 to 45 minutes
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    Oregon Museum of Science and Industry
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    Learners design, build, and test models of "dragon boats" made from up to three milk cartons. They observe how well the boats can be pulled through water in a homemade testing tank, and...

    $5 - $10 per group Ages 4 - 14 30 to 45 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners use red cabbage juice and pH indicator paper to test the acidity and basicity of household materials. The activity links this concept of acids and bases to acid rain and other pollutants....

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes