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In this activity, learners discover that atoms and ions of different metals will change places.

1 cent - $1 per group Ages 11 - adult Under 5 minutes
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Learners investigate how drag affects the falling rate of objects.

1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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In this activity, learners design and build a Zoom-a-rang using everyday materials. Experiment with different materials and Zoom-a-rang designs to see how they fly.

1 cent - $1 per group Ages 4 - adult 5 to 10 minutes
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Most people break at least two bones in their lifetime. In this activity, learners will use celery stalks to model the many ways that bones can fracture.

1 cent - $1 per student Ages 8 - adult 10 to 30 minutes
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Is this activity concentrating on physical science, learners build their very own miniature hovercraft out of a paper cup. Using it, they can explore the concepts of friction and force.

1 cent - $1 per student Ages 6 - 18 10 to 30 minutes
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In this activity, learners construct a cereal chain as a model of how proteins are made in the cell.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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In this activity, learners examine raindrop bottles (prepared ahead of time) to observe in slow motion the behavior of falling droplets and explore concepts such as drag and terminal velocity.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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In this activity, learners play a card game that explores the relative sizes of various objects. Learners compete to organize their hand of cards into lists of objects from largest to smallest.

1 cent - $1 per group Ages 4 - adult 10 to 30 minutes
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In this activity, learners explore the relationship between cooling water vapor and condensation. Learners investigate condensation forming on the outside of a cold cup.

1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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In this activity, learners mark their height on a height chart and discover how tall they are in nanometers.

1 cent - $1 per group Ages 4 - adult 5 to 10 minutes
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In this activity, learners use a string and pair of scissors to find pi in the world all around them. Take the circumference of a round object with string and cut the string to that length.

1 cent - $1 per group Ages 11 - adult 5 to 10 minutes
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In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.

1 cent - $1 per group Ages 6 - 14 2 to 4 hours
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In this activity, learners write invisible messages on goldenrod paper, and make the message appear and disappear using acids and bases.

1 cent - $1 per student Ages 6 - 14 30 to 45 minutes
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In this activity (1st on the page), learners explore circadian rhythms by keeping track of their body temperature.

1 cent - $1 per student Ages 8 - 18 4 to 24 hours
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In this engineering activity, learners test the stability of towers they build out of cups, discovering that structures with more mass in the base are more stable.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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Learners use scientific processes to solve a crime. As they get clues, learners must create a hypothesis then adjust that hypothesis as more information is revealed.

1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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In this activity, learners will create their very own constellation.

1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.

1 cent - $1 per group Ages 8 - adult Under 5 minutes
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In this physics activity (page 5 of the PDF), learners will witness the effects of free fall by observing falling water, and will gain a better understanding of the concept of weightlessness.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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On the first night, I saw 5 stars in the desert. On the second night, I saw 10… What do you think I saw on the third night? Combine arts and crafts, literacy, and math by making a counting book.

1 cent - $1 per student Ages 4 - 14 30 to 45 minutes