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In this activity, learners find out why some mineral sunblock rubs in clear. Learners compare nano and non-nano sunblocks and discover how particle size affects visibility.

$5 - $10 per group Ages 4 - adult 5 to 10 minutes
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In this online activity, learners measure their pulse rates and investigate how their pulses change when they engage in different activities.

free Ages 8 - 11 10 to 30 minutes
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In this activity, learners determine the necessary conditions for pea seed germination.

$5 - $10 per group Ages 8 - 11 1 to 7 days
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In this activity (located on pages 9-14 of PDF), learners visit a cemetery to examine the distinguishing characteristics of rock weathering.

free Ages 8 - 14 1 to 7 days
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Many germs spread by our hands, and often times, people don't wash their hands well enough to get rid of germs.

$1 - $5 per group Ages 6 - adult 5 to 10 minutes
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Challenge popular misconceptions, learners explore how a mirror actually reflects an image in this activity.

1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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Learners construct a bird feeder from re-used materials. After hanging their feeder, they keep a journal about what birds visit the feeder.

$1 - $5 per student Ages 6 - 11 1 to 4 weeks
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In this activity, learners plant seeds and watch them sprout and grow inside a CD case.

1 cent - $1 per student Ages 4 - 11 1 to 7 days
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In this activity, learners keep track of how much paper the group uses in a week. Build awareness of paper waste, while strengthening measurement and estimation skills.

free Ages 4 - 14 5 to 10 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
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In this activity, learners use information gathered from a variety of sources to design and make their own insect.

1 cent - $1 per student Ages 4 - 14 45 to 60 minutes
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In this activity, learners use sound to figure out, or infer, the position of objects. Learners create a maze inside a shoebox with blocks of wood.

1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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In this interactive game, learners compare their music-listening skills with that of a three-month-old baby.

free Ages 6 - adult 5 to 10 minutes
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In this activity, learners will take a step back and learn the history of the land they live on, and the people who used to live on it.

$1 - $5 per student Ages 6 - adult 30 to 45 minutes
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This activity is a sensory experience that recreates the sounds of a pond at night.

free Ages 6 - 11 30 to 45 minutes
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In this activity, learners collect worms and then observe how they move.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

$1 - $5 per student Ages 8 - 18 1 to 7 days
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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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Combine math and exercise with this activity. Learners count how many times in a row they can skip rope or throw and catch a ball.

free Ages 4 - 14 10 to 30 minutes
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In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.

$5 - $10 per group Ages 8 - 18 1 to 2 hours