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In this chemistry activity (on page 2 of the PDF), learners corrode a penny in a cup with vinegar, salt water, and a source of iron (nails, paper clips, or twist ties).

1 cent - $1 per student Ages 6 - 14 1 to 7 days
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In this experiment, learners test multiple food items to see if they are an acid or base using an indicator solution created with red cabbage.

$5 - $10 per group Ages 6 - 14 10 to 30 minutes
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Learners make kimchee or sauerkraut, which is really just fermented cabbage, in a 2-liter plastic bottle.

$1 - $5 per group Ages 4 - 14 1 to 4 weeks
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In this activity, learners explore acids and bases by preparing six solutions that combine vinegar and ammonia, ranging from acid (all vinegar) to base (all ammonia).

$5 - $10 per group Ages 8 - adult Under 5 minutes
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Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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In this Spanish-language chemistry activity, learners use simple materials to explore how fire extinguishers work to put out fires.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners use detergent solution to compare two solutions containing vinegar and cream of tartar.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners transform everyday milk into small plastic figurines and jewelry. Use this activity to introduce learners to monomers and polymers.

$1 - $5 per student Ages 6 - 18 30 to 45 minutes
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A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes