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In this activity on page 4 of the PDF (Water in Our World), learners conduct some quick and easy tests to determine the differences between water and other liquids that look very similar to water.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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Build a glider that uses the same physics as a curve ball, for less than a dime.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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To understand how skaters turn in midair, try this little experiment! Individuals can do this activity alone, but it works better with a partner.

free Ages 8 - 18 10 to 30 minutes
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In this activity, learners make scale models of the Sun and Earth out of paper mache.

$5 - $10 per group Ages 8 - adult 1 to 2 hours
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This activity (located on page 3 of the PDF under GPS: Alligator Habitat Activity) is a full inquiry investigation into organisms and the health of their ecosystems.

$5 - $10 per group Ages 8 - 14 2 to 4 hours
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During this lesson, learners will determine their blood pressure and learn about systolic and diastolic pressures.

1 cent - $1 per group Ages 8 - 18 30 to 45 minutes
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In this activity about neuron/target muscle recognition (page 44 of the PDF), learners arranged in two rows facing away from each other use string to simulate neural development.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

free Ages 6 - 18 Under 5 minutes
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In this activity, learners observe what happens when yeast cells are provided with a source of food (sugar). Red cabbage "juice" will serve as an indicator for the presence of carbon dioxide.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners discover that two pendulums suspended from a common support will swing back and forth in intriguing patterns, if the support allows the motion of one pendulum to influence t

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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Learners create an Incan counting device called a quipu (pronounced kee-poo).

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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Learners observe a tank of water containing cans of diet and regular sodas. The diet sodas float and the regular sodas sink. All the cans contain the same amount of liquid and the same amount of air.

$5 - $10 per group Ages 6 - 14 5 to 10 minutes
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In this chemistry activity, learners perform three chemical reactions in a sealed zip-top bag. Learners will record their observations and classify the changes as chemical or physical.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners explore the concept of insulation by trying to keep Olaf the Snowman from melting. This activity encourages critical thinking and problem solving.

$5 - $10 per group Ages 4 - adult 2 to 4 hours
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In this activity, learners evaluate the potential performance of air rockets placed inside a wind tunnel.

Over $20 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners shrink the scale of the vast solar system to the size of their neighborhood.

Over $20 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners heat ice and water of the same temperature to get a hands-on look at phase changes. This is an easy and inexpensive way to introduce states of matter and thermodynamics.

1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.

$1 - $5 per student Ages 6 - 14 5 to 10 minutes
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Learners will build and experiment with their own windmills made from simple household materials.

$10 - $20 per group Ages 6 - 14 30 to 45 minutes