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In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.

Over $20 per group Ages 4 - 14 10 to 30 minutes
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In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.

$10 - $20 per group Ages 4 - 14 10 to 30 minutes
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Build a catapult that transforms the potential energy of a twisted rubber band into kinetic energy. Experiment with design variations so that you can hit a target with a projectile.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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Learners mix a variety of substances with red cabbage juice. The juice changes color to indicate whether each substance is an acid or a base.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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Learners investigate signs of a chemical reaction when they mix vinegar and baking soda. In addition to a gas being produced, learners also notice the temperature decreases.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners use simple materials to construct a balloon-powered pinwheel. The pinwheel is a great way to investigate Newton's Third Law of Motion.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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Learners use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this chemistry investigation, learners combine common cooking substances (flour, baking powder, sugar, salt, pepper, oil, water, food coloring) to explore mixtures.

$10 - $20 per student Ages 4 - 8 10 to 30 minutes
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During this activity, learners will make different versions of "ooze" using varied proportions of detergent and glue.

$5 - $10 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners explore atoms as the smallest building blocks of matter. With adult help, learners start by dividing play dough in half, over and over again.

$1 - $5 per student Ages 4 - 8 10 to 30 minutes
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In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear.

Over $20 per group Ages 4 - 14 10 to 30 minutes
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In this experiment, learners try different liquids to see which ones clean pennies best. Liquids to try include water, lemon juice, cola, vinegar, and dishwashing detergent.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners will experiment with catalysts to create an at-home version of elephant toothpaste.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this chemistry challenge, learners systematically investigate which combination of four solutions produces a deep red color.

$10 - $20 per group Ages 11 - 18 10 to 30 minutes
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In this activity, learners explore the concepts of density and basic chemical reactions as they create a homemade lava lamp effect using water, oil, food coloring, and Alka-Seltzer tablets.

$5 - $10 per student Ages 6 - 14 10 to 30 minutes
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Learners build a small rocket using a matchstick and a piece of aluminum foil. A second, lit match launches the match rocket. This activity involves fire; adult supervision required.

free Ages 11 - 14 10 to 30 minutes
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In two separate bags, learners mix water with Epsom salts and detergent.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners mix ingredients in a plastic bag, and then identify three characteristics of a chemical reaction: production of heat, color change, and production of a gas.

$5 - $10 per group Ages 11 - 18 10 to 30 minutes
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In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

Over $20 per group Ages 4 - 14 10 to 30 minutes
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In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch.

$10 - $20 per student Ages 4 - 8 10 to 30 minutes