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    Twin Cities Public Television
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    In this quick activity about pollutants and groundwater (page 2 of PDF), learners build a model well with a toilet paper tube. Learners use food coloring to simulate pollutants and observe how they...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    This is an activity (located on page 3 of the PDF) about the use of reduction agents to decontaminate ground water. Learners will conduct a reduction-oxidation (redox) reaction in which vitamin C...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours