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In this activity, learners work in teams to construct human lung models from small plastic beverage bottles and balloons.

1 cent - $1 per student Ages 8 - 14 30 to 45 minutes
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In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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Make impact craters with marbles (or rocks or washers) in a container of flour. Find out what you can learn about your "comets" by the craters they make.

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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This activity offers learners and their families several ways to raise their awareness together about home water.

free Ages 4 - adult 1 to 7 days
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In this demonstration, learners compare and contrast regular water ice to dry ice (frozen carbon dioxide). Both samples are placed in a solution of acid-base indicator.

$1 - $5 per group Ages 8 - 14 5 to 10 minutes
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In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners explore dinosaur fossils and skeletons. First, learners listen to "Tyrannosaurus Rex" by Daniel Cohen to learn about T. rex dinosaurs specifically.

1 cent - $1 per group Ages 6 - 8 45 to 60 minutes
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Learners observe two model atmospheres -- one with normal atmospheric composition and another with an elevated concentration of carbon dioxide.

$5 - $10 per group Ages 14 - 18 45 to 60 minutes
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In this activity related to climate change and data analysis, learners examine temperature and precipitation data to determine if climate variations are due to El Niño.

free Ages 14 - 18 1 to 2 hours
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In this activity, learners try to blow up a balloon hanging inside of an empty bottle.

1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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In some parts of the world, lakes freeze during winter. In this activity learners will explore water’s unique properties of freezing and melting, and how these relate to density and temperature.

$5 - $10 per group Ages 8 - adult 10 to 30 minutes
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In this activity, learners make edible T. rex teeth (with adult assistance). The treat is a white and dark chocolate covered banana on a stick.

$5 - $10 per group Ages 4 - 8 10 to 30 minutes
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Learners test two jars containing hot water, one covered with plastic and one open, for changes in temperature.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore the etymology of dinosaur names.

1 cent - $1 per group Ages 8 - 11 45 to 60 minutes
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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners create their own archaeological profiles.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners explore the concept of density-driven currents (thermohaline circulation) and how these currents are affected by climate change.

$10 - $20 per group Ages 8 - adult 1 to 2 hours
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Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

$10 - $20 per group Ages 8 - adult 10 to 30 minutes
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In this activity related to dinosaurs, learners explore why animals live in families. Learners discuss and identify animals living in families or groups from images and photos.

$1 - $5 per group Ages 4 - 6 45 to 60 minutes
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In this activity (located at the top of the page), learners make an easy river strainer and see what they can catch.

$1 - $5 per student Ages 4 - 11 1 to 2 hours