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In this health activity (located on page 4 of the PDF), learners will discover the importance of hand washing by observing mold growing on potatoes.

$10 - $20 per group Ages 6 - 11 1 to 4 weeks
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In this environmental health activity, learners grow and observe bread mold and other kinds of common fungi over the course of 3-7 days.

1 cent - $1 per group Ages 8 - 14 1 to 7 days