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In this activity on page 8 of the PDF (Behind the Scenes with Chemistry), learners make three of Harry Potter's essential school supplies: quills, ink, and color-changing paper.

$10 - $20 per student Ages 8 - 14 1 to 7 days
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In this outdoor activity, learners go "can fishing" and discover the kinds of aquatic organisms that live in and on submerged cans.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

1 cent - $1 per student Ages 14 - 18 10 to 30 minutes
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In this activity, learners learn about the adaptations that flowers have developed which support pollination. Learners also list their personal preferences (i.e.

free Ages 8 - 14 30 to 45 minutes
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This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed.

1 cent - $1 per group Ages 11 - adult 5 to 10 minutes
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In this activity, learners use simple tools to build a bookshelf with a built-in bookend.

$5 - $10 per student Ages 11 - 18 1 to 2 hours
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In this activity, learners electrically plate zinc onto brass objects.

1 cent - $1 per group Ages 11 - adult Under 5 minutes
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In this activity, learners discover what buoyancy is and determine the characteristics that make an object buoyant. Learners design, build, test, and evaluate boats made from a variety of materials.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this physics activity (page 8-9 of the PDF), learners will explore wind energy. They will build their own windmill and see how energy from wind can be converted into a useable form.

$1 - $5 per group Ages 6 - 11 30 to 45 minutes
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Combine logic and numbers in this game for all ages. Players start with a 10x10 grid of the numbers 1 to 100. One person chooses a secret number and announces the range in which it falls.

free Ages 4 - 14 5 to 10 minutes
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After a discussion about what a parachute is and how it works, learners create parachutes using different materials that they think will work best.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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In this activity (p.5-6 of PDF), learners investigate natural selection. Learners discover that natural selection, which takes place over decades, can lead to altered populations within a species.

$5 - $10 per group Ages 8 - 11 10 to 30 minutes
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The Butterflies in Space Teacher's Guide uses "life in space" to encourage learners to conduct their own open-ended scientific investigations.

Over $20 per group Ages 6 - 18 1 to 4 weeks
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Using simple materials, learners will construct the end effector (grasping device) of a robotic arm and use the device to capture and pick up an object.

1 cent - $1 per student Ages 8 - 11 45 to 60 minutes
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In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site.

Over $20 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners can play two card games related to endangered species, specifically North American amphibians.

1 cent - $1 Ages 6 - 11 5 to 10 minutes
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This activity (on page 2 of the PDF SciGirls Activity: Milk Carton Boat) is a full inquiry investigation into boat hull design.

$10 - $20 per group Ages 8 - 14 4 to 24 hours
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In this activity, learners use multiplication skills to get groups of aliens safely back to their planet.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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Even fast computers are limited to how quickly they can solve problems. One way to speed things up is to use several computers at once.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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This outdoor activity (on page 2 of the PDF under SciGirls Activity: Sand Dunes) is a full inquiry investigation into how the amount of moisture in a sand dune relates to the number of plants growing

$10 - $20 per group Ages 8 - 14 2 to 4 hours