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In this activity (posted on March 12, 2011), learners follow the steps to construct a spectroscope, a tool used to analyze light and color.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners conduct tests for proteins, glucose, and starch.

Over $20 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners explore the forces at work in water. Learners experiment to find out what happens to pepper in water when they touch it with bar soap and liquid detergent.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes
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In this activity (located on page 7 of PDF), learners explore how Silly Putty was first invented and then attempt to make a batch of their own.

$10 - $20 per group Ages 4 - 11 45 to 60 minutes
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In this activity, learners explore acid and bases as they create their own invisible ink out of baking soda and grape juice.

$1 - $5 per student Ages 4 - 18 10 to 30 minutes
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In this activity, learners make their own bath bomb fizzies and experience what happens when they mix a base and an acid.

$10 - $20 per student Ages 4 - 14 10 to 30 minutes
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In this activity, learners create a gelatinous slime using guar gum powder and borax. Educators can use this simple activity to introduce learners to colloids.

$10 - $20 per group Ages 6 - 18 30 to 45 minutes
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In this physics activity, learners build their own rockets out of film canisters and construction paper.

$5 - $10 per student Ages 6 - 18 10 to 30 minutes
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In this chemistry demonstration, learners observe a chemical reaction that produces a colorful effect.

$1 - $5 per group Ages 11 - 18 Under 5 minutes
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In this experiment using sprigs of Elodea, learners will observe a natural process that removes carbon dioxide (CO2) from Earth's atmosphere.

$10 - $20 per group Ages 11 - 14 1 to 2 hours
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In this activity, learners explore deoxyribonucleic acid (DNA), a nanoscale structure that occurs in nature.

Over $20 per group Ages 6 - adult 10 to 30 minutes
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In this activity (page 1 of the PDF under SciGirls Activity: Water Slides), learners will whip up some suds with a cup of water and a tablespoon of dish soap until the bubbles are stiff enough to star

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this activity learners compare the bounciness of warm and cold racquetballs to see if temperature makes a difference in how well they bounce.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity on page 9 of the PDF, learners make their own paint using chalk as a pigment and glue and water as binders. This activity introduces learners to special mixtures called suspensions.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity, which requires adult supervision, learners get to explore the awesome power of chemistry.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity (located on pages 9-14 of PDF), learners visit a cemetery to examine the distinguishing characteristics of rock weathering.

free Ages 8 - 14 1 to 7 days
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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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Heat makes some materials expand, and it makes others shrink.

1 cent - $1 per student Ages 4 - 11 30 to 45 minutes
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In this activity, learners heat and cool carbonated water to find out whether temperature has an effect on how fast the dissolved gas leaves carbonated water.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this kitchen chemistry activity, learners explore the chemistry of crystals by making sugar crystals, consider a common chemical reaction type responsible for the rising of muffins and cake in the

$5 - $10 per group Ages 8 - 14 1 to 7 days