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    Twin Cities Public Television
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    In this activity, learners build penetrometers to test leaf toughness. Biologists measure leaf toughness to study the feeding preferences of insects and bugs.

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    University of Nebraska State Museum
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    In this activity (on pages 34-39), learners make a fairly detailed model of DNA using licorice and gumdrops. The sugar and phosphate backbone of DNA is represented by alternating red and black...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    WGBH
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    Have you noticed the plastic rings that are used to hold six-packs of soda? Those rings are great for carrying cans, but they're real trouble when they become trash that animals can get...

    $1 - $5 Ages 8 - 14 45 to 60 minutes
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    BioEd
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    In this activity, learners compare and contrast their own skin (including the area covered) with that of an orange. This activity helps learners understand that skin is a vital part of the body and...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    Oregon Museum of Science and Industry
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    In this activity, learners investigate the process of osmosis by adding salt to a sealed bag of raw carrots and comparing it to a control. After about 15-30 minutes, the carrots with salt become...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes

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