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In this activity, learners explore the forces at work in water. Learners experiment to find out what happens to pepper in water when they touch it with bar soap and liquid detergent.

$1 - $5 per student Ages 8 - 18 5 to 10 minutes
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In this activity, learners explore acid and bases as they create their own invisible ink out of baking soda and grape juice.

$1 - $5 per student Ages 4 - 18 10 to 30 minutes
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How does a green roof, or roof covered by plants, affect the temperature of the inside and outside of a building? Learners design and build houses to find out the answer.

$1 - $5 per group Ages 11 - 14 1 to 2 hours
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In this physics activity (page 8 of the PDF), learners will make their very own working compass.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this chemistry demonstration, learners observe a chemical reaction that produces a colorful effect.

$1 - $5 per group Ages 11 - 18 Under 5 minutes
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In this activity, learners will explore the dynamics of air pressure by using a candle, a cup, and a dish of water.

$1 - $5 per student Ages 4 - 18 5 to 10 minutes
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Learners build simple catapults and use them to launch cotton balls.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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In this activity learners compare the bounciness of warm and cold racquetballs to see if temperature makes a difference in how well they bounce.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity, which requires adult supervision, learners get to explore the awesome power of chemistry.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity about electricity, learners explore what happens when you blow a fuse.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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Learners investigate signs of a chemical reaction when they mix vinegar and baking soda. In addition to a gas being produced, learners also notice the temperature decreases.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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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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In this activity, learners will imagine the challenges and opportunities of asteroid mining.

$1 - $5 per group Ages 4 - adult 10 to 30 minutes
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In this Engineering Design Challenge activity, learners will use balloons to investigate how a multi-stage rocket, like that used in the Interstellar Boundary Explorer (IBEX) mission, can propel a sat

$1 - $5 per student Ages 8 - adult 10 to 30 minutes
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This activity provides instructions for building a mirrored tube--a smaller and simpler version of a submarine's periscope--that lets you see around corners and over walls.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this activity about electricity and magnetism, learners examine what happens when a magnet exerts a force on a current-carrying wire.

$1 - $5 per student Ages 8 - 14 5 to 10 minutes
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This activity was designed for blind learners, but all types of learners can use it to investigate how, in a one-celled organism such as a bacterium, the division of cells increases the number of cell

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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This activity (on pages 23-27) lets learners simulate the work of scientists who take core samples of Earth's rocky layers to determine geological history.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners will code an algorithm to make it through a maze.

$1 - $5 per group Ages 6 - adult 10 to 30 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