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    Pratt School of Engineering, Duke University
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    Each learner chews a piece of gum until it loses its flavor, and then leaves the gum to dry for several days. By weighing the gum before and after chewing, they can determine the amount of mass...

    $1 - $5 per group Ages 11 - 14 2 to 4 hours
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners build devices from rubber bands to test for invisible air pollutants. They then place the devices in different locations for a period of days or weeks, including one device in a closed...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    American Physical Society
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    Learners build a pendulum from a yo-yo, and then design their own experiment to determine what affects the pendulum's period of swing. They can alter the mass of the yo-yo by adding play dough...

    $1 - $5 per group Ages 11 - 14 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    Learners design their own experiment to investigate how pollution diffuses through ground material. This model for leaking underground storage tanks helps learners connect their learning to...

    $1 - $5 per group Ages 11 - 14 30 to 45 minutes
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    Pratt School of Engineering, Duke University
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    Learners initially test to see how many drops of liquid (water, rubbing alcohol, and vegetable oil) can fit on a penny. They then generate their own hypotheses to explain the results and design...

    $1 - $5 per group Ages 11 - 14 10 to 30 minutes
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    National Health Museum
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    In this activity, learners will examine a variety of seeds, describe them, and determine how they are dispersed. Learners will investigate seed dispersal mechanisms by creating and testing a wind...

    $1 - $5 per group Ages 14 - 18 2 to 4 hours
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    American Chemical Society
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    Learners design their own experiment to compare how well cocoa mix dissolves in cold and hot water. They will see that cocoa mix dissolves much better in hot water. Adult supervision recommended. ...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    American Chemical Society
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    In this activity, learners heat and cool carbonated water to find out whether temperature has an effect on how fast the dissolved gas leaves carbonated water. Learners design their own procedure,...

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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    American Chemical Society
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    Learners mix vinegar and baking soda to produce a gas. With the addition of a bit of liquid soap, the gas becomes trapped in measurable bubbles. This way, learners can alter the amount of...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    American Chemical Society
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    Learners create hard water by mixing Epsom salt and water. Then they compare what happens when soap solution is mixed with hard water and regular water. The precipitate that forms from soap and...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes

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