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Can you read the sentence "I C U"? Not really - but if you say each letter aloud, you'll say the simple sentence, "I see you." What if you change the "C" into a picture of an eye?

free Ages 4 - 11 10 to 30 minutes
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In this activity, learners discover which plants and animals have symbiotic relationships and how this impacts each organism.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners make a model of the hot water of a deep sea vent in the cold water of the ocean to learn about one of the ocean's most amazing and bizarre underwater habitats.

1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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In this health activity (on page 3 of the PDF), learners will learn about the body‘s defenses against invasion from tiny particles.

$10 - $20 per group Ages 8 - 14 30 to 45 minutes
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In this activity (page 89 of the PDF), learners compare and contrast pitch and roll motions by using a Magic Carpet maze similar to one that was used for Neurolab investigations about microgravity.

1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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In this activity (on page 146 of the PDF), learners will explore the effects of increased carbon dioxide in the bloodstream.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners build a bird feeder or feeders to attract birds for observation.

$1 - $5 per group Ages 6 - 14 30 to 45 minutes
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In this biology/ecology activity, learners construct a terrarium out of a tennis ball container. This terrarium is unique because it never has to be watered.

$1 - $5 per student Ages 6 - 11 1 to 4 weeks
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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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See and hear how sound waves travel through different types of materials. Extend the experiment online and learn how you can "see" with sound waves using ultrasound.

1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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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 use found natural materials to create a water haven for bees and other insects.

free Ages 4 - adult 10 to 30 minutes
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This activity (aka "snack") provides instructions for discovering your blind spot. It is an exploration of light and visual perception using simple materials you may have around the house.

1 cent - $1 per student Ages 11 - 14 10 to 30 minutes
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In this activity (on page 2 of the PDF under GPS: Biodiversity Activity), learners will pair up and take a notebook outdoors to a selected location to observe and record a list of living things that t

free Ages 8 - 14 1 to 2 hours
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Learners place cut flowers in colored water and observe how the flowers change. The flowers absorb the water through the stem and leaves.

$1 - $5 per student Ages 8 - 18 1 to 7 days
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This is an activity about music, movement, and math. Learners will start a rhythm pattern with 2, 3, or 4 beats. For instance, tap your foot, jump, clap, repeat.

free Ages 4 - 14 5 to 10 minutes
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In this activity, learners discover how their heart rate changes in different situations.

$5 - $10 per student Ages 8 - 14 30 to 45 minutes
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In this activity, learners surprise their eyes with an optical illusion involving arrows made out of pipe cleaners.

1 cent - $1 per student Ages 6 - 11 Under 5 minutes
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In this activity (11th activity on the page), learners use pennies to test their hearing acuity.

free Ages 6 - 18 10 to 30 minutes