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In this activity (page 12), learners explore how molecules self-assemble and how molecules must fit together, like a lock and key, in order to identify each other and initiate a new function as a comb

$1 - $5 per group Ages 11 - 14 45 to 60 minutes
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Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.

1 cent - $1 per student Ages 4 - adult 5 to 10 minutes
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In this activity, learners will estimate how many seeds are in a fruit or vegetable, then count to find out. The result: mix estimation with healthy eating.

1 cent - $1 per group Ages 4 - 14 10 to 30 minutes
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Create your own spinning top, and explore color, shapes and spinning. This activity contains instructions for making your spinning top, and tips on how to design and decorate it.

1 cent - $1 per student Ages 4 - 8 5 to 10 minutes
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In this activity, learners will create their own coral polyps - the basis for a coral reef.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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In this optics activity, learners split white light into all its component colors using three household items: a compact disc, dishwashing liquid, and a hose (outside).

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners create slime to model mucus and examine how it collects simulated particles. Mucus keeps particles from the environment out of our lungs when we breathe.

$5 - $10 per student Ages 4 - 11 10 to 30 minutes
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Are balloons porous or non-porous? In this activity, learners watch an entertaining Mr. O video and conduct a simple experiment to find out.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this activity, groups of learners work together to create edible models of chemicals involved in autotrophic nutrition.

$5 - $10 per group Ages 14 - 18 1 to 2 hours
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Learners build pan pipes out of drinking straws by cutting them to different lengths. Then, learners make music by blowing across the straws and playing some well-known songs.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this quick activity (located on page 2 of the PDF under GPS Wetlands Activity), learners will model how wetlands act as natural filters for the environment.

$5 - $10 per group Ages 8 - 14 10 to 30 minutes
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In this activity (14th activity on the page) about the sense of touch, learners examine if it is easier or harder to identify an object if they move their hands over it.

free Ages 4 - 18 5 to 10 minutes
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In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste.

$1 - $5 per group Ages 8 - 18 5 to 10 minutes
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In this activity (16th on the page), learners play a variation of the "I Spy" game to explore color. Learners work in teams with each team assigned a color.

1 cent - $1 per group Ages 4 - 11 10 to 30 minutes
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In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand.

1 cent - $1 per group Ages 8 - 18 Under 5 minutes
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In this activity (3rd activity on the page), learners taste test different foods and categorize them as sweet, bitter, sour, or salty. Learners compare their results with the group.

$1 - $5 per group Ages 4 - 11 10 to 30 minutes
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In this activity, learners calculate their water usage (in cups and galloons) during an average shower. Learners also chart and analyze water usage during showers in their households.

free Ages 6 - 11 45 to 60 minutes
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In this activity, learners create an optical illusion by spinning two attached cups. A round ball seems to magically appear when the cups spin.

1 cent - $1 per student Ages 6 - 11 Under 5 minutes
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In this quick activity, learners take a balance challenge to measure their average balance time. As they collect data, they investigate how practice and repetition improve their balance time.

$5 - $10 per group Ages 8 - 11 5 to 10 minutes
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This activity (located on page 8 of the PDF) introduces learners to the concept of Non-point Source Pollution--what happens when rain washes garbage and other pollutants into rivers and lakes.

$5 - $10 per group Ages 6 - 11 5 to 10 minutes