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We all Scream for Ice Cream

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In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.
$5 - $10 per group Ages 6 - 14 30 to 45 minutes

Cleaning Water with Dirt

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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.
$5 - $10 per student Ages 8 - 14 45 to 60 minutes