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Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

$5 - $10 per group Ages 4 - 14 10 to 30 minutes
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In this activity, learners use chemistry to “self-assemble” gummy shapes. Learners discover that self-assembly is a process by which molecules and cells form themselves into functional structures.

$10 - $20 per group Ages 4 - adult 10 to 30 minutes
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In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.

free Ages 4 - adult Under 5 minutes
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In this activity, learners will explore basic information about thermodynamics by experimenting with ice. Learners will compare ice melting rates on metal pans or plastic cutting boards.

$1 - $5 per group Ages 4 - 18 10 to 30 minutes
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In this activity, learners will be working with predictions with a time frame of one week, or longer. Start by planting seedlings.

$1 - $5 per group Ages 4 - 14 1 to 4 weeks
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In this activity, learners investigate how inkjet printers produce tiny, precise drops of ink.

$10 - $20 per group Ages 4 - adult 10 to 30 minutes
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In this activity, learners create a colorful bookmark using a super thin layer of nail polish on water. Learners discover that a thin film creates iridescent, rainbow colors.

$10 - $20 per group Ages 4 - adult 5 to 10 minutes
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In this health activity (page 3 of the PDF), learners will discover why covering their mouth and nose while sneezing is so important.

$1 - $5 per group Ages 4 - 14 10 to 30 minutes
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In this activity (on pages 13-16 of the PDF) learners investigate three mystery samples to see which one contains life. The three samples are sand, sand and yeast, and sand and antacid.

1 cent - $1 per group Ages 4 - 14 30 to 45 minutes
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In this activity, learners capture and observe planaria, which are worms that eat tiny pond critters.

$1 - $5 per student Ages 4 - 18 10 to 30 minutes
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Learners cut and fold a paper helicopter from the template in this PDF. They practice twirling the helicopter and observe what happens as they modify their tries.

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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In this activity, learners make a paper model of a polymer, then make Silly Putty, an actual polymer.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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In this activity, learners make pykrete by freezing a mixture of water and a material like cotton wool, grass, hair, shredded paper, wood chips, or sawdust.

1 cent - $1 per student Ages 4 - adult 4 to 24 hours
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The goal of this activity is to design, build and test a house or toy for an animal.

$1 - $5 per group Ages 4 - 18 30 to 45 minutes
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Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

1 cent - $1 per student Ages 4 - 14 Under 5 minutes
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This is an activity about waves. Using marbles, paper clips and rubber bands, learners explore how waves behave.

$1 - $5 per student Ages 4 - 14 10 to 30 minutes
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In this activity, learners explore the behavior of cold-blooded animals. Learners discover what happens when they change a fly's temperature.

$1 - $5 per group Ages 4 - 14 45 to 60 minutes
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In this activity, learners use plastic tubing and a funnel to listen to their heart. Learners also discover that if they run around, their heart pumps harder and faster, making it easier to hear.

$1 - $5 per student Ages 4 - 14 5 to 10 minutes
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This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface.

1 cent - $1 per student Ages 4 - 14 2 to 4 hours
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In this online game, learners practice memory recall. They are shown a collage of pictures for two minutes, then have to write down everything they remember and check how they did.

1 cent - $1 per student Ages 4 - 18 5 to 10 minutes