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Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

$10 - $20 per group Ages 6 - adult 10 to 30 minutes
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In this activity related to flight, learners conduct two simple tests to explore how lift works.

1 cent - $1 per group Ages 8 - 14 5 to 10 minutes
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In this activity, learners use sieves with different-sized holes to sort balls by size.

Over $20 per group Ages 4 - adult 5 to 10 minutes
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In this activity about electricity, learners suspend pieces of tape from a straw to construct an electroscope, a device that detects an electrical charge.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this outdoor activity and animal-role-play game, learners discover and uncover the hidden world of "cryptozoa"—organisms such as spiders, salamanders and slugs that live under objects, like rocks a

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, one person acts as a human robot while another acts as their developer by programming their actions.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners test different food items by timing how long it takes each liquid to slide from the top of a ramp to the bottom.

$5 - $10 per group Ages 6 - 11 10 to 30 minutes
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In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light.

$5 - $10 per student Ages 6 - 14 10 to 30 minutes
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This activity (on page 3 of the PDF under GPS: Cactus Activity) is a full inquiry investigation into how some desert birds keep their cool.

$10 - $20 per group Ages 8 - 14 1 to 7 days
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In this activity, learners will build a ball run contraption.

Over $20 per group Ages 8 - adult 30 to 45 minutes
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In this science and language arts activity, learners study fish anatomy and make their very own 3D paper fish.

1 cent - $1 per student Ages 6 - 11 45 to 60 minutes
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In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

$1 - $5 per group Ages 8 - adult 10 to 30 minutes
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Did you know that using a lens one can bend light to make pictures of the world? It's true!

$1 - $5 per student Ages 4 - 11 10 to 30 minutes
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"Exploring the Solar System: Craters" is an active, hands-on activity that demonstrates how craters form, and what they can teach us about the history and composition of planets and moons.

1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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In this activity, learners use sand and ice cubes to create a model of permafrost and the effects of the ice melting through the surface.

$1 - $5 per group Ages 8 - 18 45 to 60 minutes
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In this activity on page 2 of the PDF, learners test different materials to find out which is the best insulator.

$1 - $5 per student Ages 6 - 14 1 to 2 hours
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This activity (on page 3 of the PDF under GPS: Sailboat Design Activity) is a full inquiry investigation into design optimization.

$5 - $10 per group Ages 8 - 14 2 to 4 hours
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In this activity on page 7 of the PDF, learners experiment with the interesting designs that can be made by painting on plaster.

$10 - $20 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners design a device to solve a problem: how to get a ball out of a drain pipe.

$5 - $10 per group Ages 6 - 14 45 to 60 minutes