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Learners test two jars containing soil, one covered and one open, for changes in temperature. After placing the jars in the Sun, learners discover that the covered jar cools down more slowly.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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Learners investigate the concept of humidity by using a dry and wet sponge as a model. They determine a model for 100% humidity, a sponge saturated with water.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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Learners display their findings after a study of surface area and volume. They build a mobile to show a commercially available box and a constructed cubical box of the same volume.

1 cent - $1 per student Ages 11 - 14 1 to 2 hours
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Learners test two jars, one containing plain air and one containing carbon dioxide gas, to see their reactions to temperature changes.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

1 cent - $1 per group Ages 8 - adult 30 to 45 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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Somatic Cell Nuclear Transfer (SCNT) is a cloning method that involves transferring a nucleus from a somatic cell of the individual to be cloned to an enucleated egg.

1 cent - $1 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.

1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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In this activity, explore chromatography and the various colors that make up the ink in markers. Use this activity to investigate cohesion and adhesion.

1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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Learners trace, cut out and fly a boomerang, outdoors or in a large indoor space.

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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In this activity, learners construct a simple game to test their hand-eye coordination and steadiness of hand.

1 cent - $1 per student Ages 6 - 14 30 to 45 minutes
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This simple construction activity teaches the importance of architectural structure. Learners build and test designs for a paper "doghouse" strong enough to hold the weight of a jumbo dog biscuit.

1 cent - $1 per student Ages 6 - 11 45 to 60 minutes
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In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

1 cent - $1 per student Ages 11 - 14 45 to 60 minutes
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In this inquiry-based lesson, learners measure the biomass of trees, calculate the carbon stored by the trees, and use this information to create recommendations about using trees for carbon sequestra

1 cent - $1 per student Ages 11 - 14 1 to 2 hours
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In this activity, learners discover that they can modify a regular piece of paper so that it's large enough for them to walk through!

1 cent - $1 per student Ages 8 - 14 Under 5 minutes
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This is an activity about lung capacity. Learners will measure their own lung capacity using a homemade spirometer.

1 cent - $1 per student Ages 6 - 18 10 to 30 minutes
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Space telescopes can offer us better, clearer views of the universe (and of our own planet) than Earth-based telescopes can, but getting these large, delicate pieces of equipment into orbit is tricky.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners will explore coding by arranging words and phrases to create an order of operations in this low tech version of computer programming.

1 cent - $1 per student Ages 6 - 14 30 to 45 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 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