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    NOAA
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    In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater. This...

    1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel. They detect the electricity the battery makes by listening to it on a...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Extract your DNA from your very own cells! First, learners swish salt water in their mouth to collect cheek cells and spit the water into a glass. Then, learners add liquid dishwashing detergent...

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes