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In this activity (on pages 25-32 of PDF), learners make models of the inner ear out of pipe cleaners.

1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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The popular sudoku puzzles use numbers, but the game could played with any set of 9 different objects!

1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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In this activity, learners investigate the sense of hearing and plan and conduct their own experiments.

$10 - $20 per group Ages 11 - 14 2 to 4 hours
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In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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Using indirect methods, learners determine the shape and size of a piece of carpet hidden under a piece of plywood.

$10 - $20 per group Ages 14 - 18 30 to 45 minutes
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In this activity, learners construct a device that allows them to view 2-D images in 3-D.

Over $20 per student Ages 6 - 11 1 to 2 hours
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Learners make their own paper using old newspaper. Learners can make their paper colorful by adding construction paper.

1 cent - $1 per group Ages 4 - 11 1 to 2 hours
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Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel.

$1 - $5 per group Ages 8 - 14 5 to 10 minutes
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Learners design their own experiment to explore the permeability of different materials such as soil, sand, gravel, and marbles.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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Play-Doh is conductive! Use the semiconductive qualities of Play-Doh to make your own squeezable instrument. Pico Cricket is required.

Over $20 per group Ages 6 - adult 45 to 60 minutes
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Learners use a simple process to extract DNA from strawberries.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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Learners observe a sealed container holding a clear colorless liquid. They shake the container and the fluid turns blue. When allowed to sit for a few moments, the fluid turns colorless again.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this activity (on pages 22-24 of the PDF), learners match extreme enviroments with life forms they support.

1 cent - $1 per group Ages 4 - 14 45 to 60 minutes
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Learners observe an electrochemical cell constructed from a small jar containing zinc and copper strips immersed in separate solutions. The strips are connected to a motor that turns a small fan.

$5 - $10 per group Ages 11 - adult 10 to 30 minutes
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In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink?

1 cent - $1 per student Ages 6 - 11 45 to 60 minutes
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In this math lesson, learners rotate through various centers while comparing and ordering objects according to length.

$5 - $10 per group Ages 4 - 6 45 to 60 minutes
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In this outdoor activity and observation game, learners hunt for a variety of textures, colors, odors and evidence of organisms in the activity site.

$5 - $10 per group Ages 4 - adult 30 to 45 minutes
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This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this nutrition and estimation activity (page 12 of PDF), learners estimate serving sizes of different foods and compare their estimates to serving size information provided on nutrition food labels

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners set up a night time insect observation station with a light and sheet.

$5 - $10 per group Ages 4 - adult 30 to 45 minutes