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In this activity on page 15 of the PDF, learners measure the amount of bubbles that they make using a detergent.

$1 - $5 per student Ages 8 - 14 30 to 45 minutes
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In this simple activity (on page 7 of the PDF), learners use water and liquid dish detergent to see which one removes lipstick better from an index card.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes