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    Oregon Museum of Science and Industry
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    Using household materials, learners can make white gooey globs from clear solutions. Alum, dissolved in water, reacts with the hydroxide in ammonia to create aluminum hydroxide. This creates a soft...

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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    Biotechnology and Biological Sciences Research Council
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    In this activity (p.23 of PDF), learners dye wool with fungi. Learners discover that natural chemicals in fungi can dye wool different colors. Note: Natural dyeing normally requires a color...

    $10 - $20 per group Ages 11 - 14 2 to 4 hours
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    The Exploratorium
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    In this activity, learners stain fabrics--on purpose! Learners explore the art of natural dyeing by using dyes and substrates that are both derived from plant or animal sources as well as mordant...

    Over $20 per group Ages 11 - 18 1 to 2 hours