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Water Filter

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In this engineering activity, challenge learners to invent a water filter that cleans dirty water.
$1 - $5 per student Ages 6 - 11 10 to 30 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