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    New York Hall of Science
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    Heat makes some materials expand, and it makes others shrink. In this experiment, learners will use unique shrinking properties of recycled plastic (solid polystyrene—general purpose recyclable...

    1 cent - $1 per student Ages 4 - 11 30 to 45 minutes
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    American Chemical Society
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    Learners observe and conduct experiments demonstrating the different properties of hot and cold materials. In a demonstration, learners observe that food coloring mixes faster in hot water than in...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes
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    Twin Cities Public Television
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    In this quick activity (page 1 of the PDF), learners will build a simple Cartesian Diver in an empty 2-liter bottle. Use this activity to demonstrate the principle of buoyancy, similar to the...

    1 cent - $1 per group Ages 8 - 14 10 to 30 minutes