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    Oregon Museum of Science and Industry
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    In this chemistry activity (on page 2 of the PDF), learners corrode a penny in a cup with vinegar, salt water, and a source of iron (nails, paper clips, or twist ties). The combination of salt and...

    1 cent - $1 per student Ages 6 - 14 1 to 7 days
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    Oregon Museum of Science and Industry
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    Eggs are placed in vinegar for one or two days to dissolve the shells. Then, learners place the eggs in water or corn syrup and observe them over a period of days. Through the process of osmosis,...

    $1 - $5 per student Ages 6 - 14 1 to 7 days
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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