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In this biology activity (page 5 of the PDF), learners use yarn and sticky labels to build a model of a DNA strand. They discover that DNA is very long, very skinny, and packs well into cells.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this activity about the brain and sleep (on page 138 of the PDF), learners measure their resting breathing rates. Learners will discover that breathing frequencies vary amongst individuals.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners explore how to protect their skin while applying pesticides to plants.

$10 - $20 per group Ages 8 - 14 10 to 30 minutes
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This game asks you a series of questions about how much time you spend in front of a screen, not being active.

free Ages 8 - 14 5 to 10 minutes
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In this activity, learners extract DNA from wheat germ. Use this activity to introduce learners to DNA, biotechnology and genetic engineering.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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In this activity, learners smell bottles containing bee pheromone molecules (or herb/spice extracts as a substitute). Bees release these molecules to send messages to each other.

$5 - $10 per group Ages 11 - 18 30 to 45 minutes
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In this activity (on pages 36-39), learners make a model of a watershed out of paper, then run water down the mountain to simulate how rainfall and pollution affect watersheds.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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Fat is a very important component in our diet. It's the most efficient source of energy in our bodies, and plays an important role in the flavor of foods.

$1 - $5 per group Ages 11 - 18 10 to 30 minutes
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In this game, learners create flash cards with an image on one side (of an animal, for example) and the sound that animal makes on the other.

$1 - $5 per group Ages 6 - adult 10 to 30 minutes
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In this environmental science lesson, learners will examine the dangers of mercury and how humans contribute to growing mercury emissions on Earth.

$5 - $10 per group Ages 14 - 18 1 to 2 hours
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In this activity, learners hook up a hair to a lever system and create a hair hygrometer to measure changes in humidity.

$1 - $5 per group Ages 8 - 18 45 to 60 minutes
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Visitors add drops of copper sulfate solution onto a steel nail. They observe the nail change color from silver to brown as the copper plates onto the nail.

$1 - $5 per group Ages 6 - adult Under 5 minutes
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This activity (on pages 35-43) lets learners analyze a "herd of elk" to detect the spread of a bacterial disease called brucellosis.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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This modeling activity allows learners to discover for themselves what Mendel uncovered in his famous pea experiments.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity (Page 30 of PDF), learners investigate the evolution of wheat by conducting sedimentation tests on different flours.

$5 - $10 per group Ages 8 - adult 10 to 30 minutes
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In this activity, learners explore the different salinities of various sources of water by taste-testing.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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This activity was designed for blind learners, but all types of learners can use it to organize an interactive model for learning the classification system (taxonomy) of living things.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity (7th activity on the page), learners use their sense of hearing to find a "sound match." Learners shake containers filled with items like dry seeds, sand, beans, etc.

$1 - $5 per group Ages 4 - 14 5 to 10 minutes
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In this activity, learners collect, analyze, and interpret information about objects in order to classify them into a cladogram. Use this activity to talk about how scientists classify things.

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