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    University of Nebraska State Museum
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    In this activity (on pages 24-34), learners explore the four-part stomach of cows (and other grazing animals called ruminants), and compare it to the human one-part stomach and its digestive...

    $5 - $10 per group Ages 8 - 14 1 to 7 days
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    BioEd
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    In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients. Learners investigate, on a small scale, the changes that...

    $5 - $10 per group Ages 8 - 14 1 to 7 days
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    American Chemical Society
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    In this activity on page 11 of the PDF, learners follow simple steps to recycle old newspaper into new paper. Use this activity to introduce conservation as well as the chemistry of cellulose and...

    $1 - $5 per student Ages 6 - 14 1 to 7 days
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    BioEd
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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. This lesson guide includes background information,...

    1 cent - $1 per group Ages 8 - 14 1 to 7 days
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    American Chemical Society
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    In this activity on page 8 of the PDF, learners make three of Harry Potter's essential school supplies: quills, ink, and color-changing paper. Learners use supplies from the grocery store to...

    $10 - $20 per student Ages 8 - 14 1 to 7 days
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    University of Nebraska State Museum
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    In this two-day activity (on pages 16-22), learners use a process like that of the Yoruba people of Nigeria to create an African symbol on cloth. Learners first make cassava gel, then paint...

    $10 - $20 per group Ages 8 - 14 1 to 7 days