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Learners design and create musical instruments from common objects; their challenge is to create an instrument that can make three different tones.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity on page 8 of the PDF, learners investigate vitamin C. Learners conduct a chemistry experiment to determine if Tang drink mix or orange juice contains more vitamin C.

$5 - $10 per student Ages 8 - 14 45 to 60 minutes
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In this matchmaking activity (on page 2 of the PDF under GPS: Animal Scent Activity), learners will each have a scented cotton ball taped to their shoulder. The scent (e.g.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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Closing one eye eliminates one of the clues that your brain uses to judge depth. Trying to perform a simple task with one eye closed demonstrates how much you rely on your depth perception.

1 cent - $1 per student Ages 6 - 14
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By building a model of a lung and diaphragm, learners discover the function of various parts of the body's respiratory system.

1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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To discover the risk and protective factors involved in substance addiction, learners play a game of chance to determine whether a fictitious child is likely or unlikely to abuse drugs.

1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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In this demonstration (9th on the page), learners explore eyewitness memory and how memories differ amongst individuals. While the rest of the group is minding their own business (i.e.

free Ages 8 - 18 10 to 30 minutes
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In this activity, learners simulate the separation techniques that materials recovery facilities (MRFs) use and then design their own series of recycling techniques.

$1 - $5 per group Ages 11 - 14 1 to 2 hours
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In this activity, learners explore how the application of nano-sized particles or coatings can change a bigger material’s properties.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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In this outdoor activity, learners saw sections from fallen trees, then count tree rings and look closely at patterns of tree growth.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this outdoor activity, learners release a portion of a lawn from human control—no mowing, no watering, no weeding, no pest control—and then investigate the changes that result over several weeks.

Over $20 per group Ages 6 - 14 1 to 12 months
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In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.

Over $20 per group Ages 8 - adult 45 to 60 minutes
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In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.

Over $20 per group Ages 8 - adult 2 to 4 hours
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In this activity (on pages 9-14), learners dissect a real flower -- the kind of work botanists do.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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This activity is designed to introduce learners to genes, genotypes and simple inheritance patterns.

1 cent - $1 per student Ages 11 - 18 45 to 60 minutes
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In this family or group activity, learners conduct a chromatography experiment to reveal the colors that leaves "hide" under their green pigments.

$1 - $5 per student Ages 6 - 14 45 to 60 minutes
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In this optics activity, learners discover that not all shadows are black. Learners explore human color perception by using colored lights to make additive color mixtures.

$5 - $10 per group Ages 6 - 18 5 to 10 minutes
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In this graphing activity (on pages 33-40), learners investigate how much and what kinds of food sea otter pups eat during their first year of life.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.

$10 - $20 per group Ages 11 - 18 1 to 7 days
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

$5 - $10 per group Ages 4 - adult 5 to 10 minutes