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This is a quick activity (on page 2 of the PDF under Stained Glass Activity) about the "Tyndall effect," the scattering of visible light when it hits very small dispersed particles.

$5 - $10 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners practice counting and multiplication as they figure out how many animal body parts they have to examine as "Dr. Vet."

1 cent - $1 per group Ages 4 - 8 10 to 30 minutes
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In this activity, learners investigate whether more people are squares or rectangles. People with similarly sized heights and arm spans are classified as squares.

free Ages 6 - 11 10 to 30 minutes
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In this activity (described on pages 39-42 of PDF), learners make a paper wheel (on pages 57-60 of PDF) that shows them the relative loudness of different sounds.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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This is a great activity about human energy production. Learners will work out with a clothespin to investigate why hockey players jump on a stationary bike after an intense game.

1 cent - $1 per student Ages 14 - adult 10 to 30 minutes
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Can you think of ways to collect and dispose of spilled oil without causing further harm to the environment?

$5 - $10 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners observe live fish in tanks to consider how their body structures are related to their behaviors and habitats.

$5 - $10 per group Ages 4 - adult 10 to 30 minutes
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In this activity, learners will make seed orbs to grow new trees and plants. Learners will explore ecology and life cycles as well as stewardship through this activity.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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In this online activity, learners find out whether they are smart enough to survive as a plant.

free Ages 11 - adult 10 to 30 minutes
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In this activity, learners observe tide pool animals in a touch tank to consider how they survive.

$5 - $10 per group Ages 4 - 11 10 to 30 minutes
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This activity (located on page 2 of PDF) introduces learners to the real size of animals using nonstandard measurement.

$1 - $5 per group Ages 4 - 11 10 to 30 minutes
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In this activity (on pages 25-32 of PDF), learners make models of the inner ear out of pipe cleaners.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners use measurement concepts to make models of what their body parts might look like if they were a snake or a chameleon.

$1 - $5 per student Ages 8 - 11 10 to 30 minutes
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In this activity related to the famous "Stroop Effect," learners explore how words influence what we see and how the brain handles "mixed messages." Learners read colored words and are asked to say th

free Ages 8 - 18 10 to 30 minutes
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In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this activity (1st on the page), learners find their blind spot--the area on the retina without receptors that respond to light.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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Learners use a simple process to extract DNA from strawberries.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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By making models of light waves with paper, learners can understand why different colors appear in bubbles.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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In this activity, learners will turn healthy greens into crispy snacks. Explore concepts of nutrition, dehydration and cooking to create healthy food.

$10 - $20 per group Ages 4 - 11 10 to 30 minutes