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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners explore the different salinities of various sources of water by taste-testing.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners explore dinosaur fossils and a dig site. Learners work in groups to analyze a dig site map and match bones to a skeletal drawing of Kelsey (a Triceratops).

1 cent - $1 per group Ages 6 - 8 45 to 60 minutes
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In this activity (1st on the page), learners conduct a series of tests to find out which of their hands is more dominant. In other words, are they right-handed or left-handed?

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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This great "re-use it" activity will demonstrate how to transform a greeting card into a box. Once constructed, the box can have many uses like holding special notes or keepsakes.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this activity, learners create a garden in a disposable glove. They learn about the conditions necessary to make the seeds sprout and actively participate in caring for their plants.

$10 - $20 per group Ages 6 - 11 1 to 4 weeks
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In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this activity, a lightbulb is placed in front of a concave mirror. The actual lightbulb is not visible to the viewer, but the viewer can see the mirror image of the lightbulb formed in space.

Over $20 per group Ages 8 - 14 30 to 45 minutes
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In this activity, learners investigate color vision as well as plan and conduct their own experiments.

$5 - $10 per group Ages 8 - 18 1 to 2 hours
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In this experiment with planaria (a type of flatworm), learners will investigate the capability of different body sections to regenerate.

$5 - $10 per student Ages 11 - 18 1 to 4 weeks
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In this activity, learners simulate taking HIV antiretroviral drugs by using Tic Tac mints and Kool-Aid packets.

$5 - $10 per group Ages 11 - 18 1 to 4 weeks
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In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

$10 - $20 per group Ages 8 - 14 45 to 60 minutes
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This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this online brain stumper, the bottom half of a series of letters is covered. You may think you know what it says, but remove the black bar to see if you're right.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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This is an activity (located on page 3 of the PDF under Water Clean-up Activity) about the use of reduction agents to decontaminate ground water.

$10 - $20 per group Ages 8 - 14 2 to 4 hours
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In this activity, learners work in teams to study the observation skills essential to scientific research.

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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In this family or group inquiry activity, learners use their senses to explore a local forest or woodland.

1 cent - $1 per group Ages 6 - 11 1 to 2 hours
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In this activity, learners create three-dimensional shapes by making some origami models of simple boxes and containers.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this outdoor beach activity, learners use a variety of "beaks" (such as trowels, spoons or sticks) to hunt for organisms that shore birds might eat.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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This is an activity which will allow learners to gain an understanding of lemur behavior through observation and role play.

free Ages 6 - 14 10 to 30 minutes