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In this activity, learners estimate how much water they think can be found in various locations on the Earth in all its states (solid, liquid, and gas) to discover the different water ratios in the Ea

free Ages 6 - 14 10 to 30 minutes
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In this activity (page 23 of PDF), learners conduct an experiment to determine how the size and mass of a projectile affects the area and the volume of an impact crater.

$10 - $20 per group Ages 8 - 14 45 to 60 minutes
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Learners investigate how the temperature of water affects its density.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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Learners see that a can of regular cola sinks while a can of diet cola floats. As a demonstration, bubble wrap is taped to the can of regular cola to make it float.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore sound by constructing a simple piano out of wood and craft sticks.

$1 - $5 per student Ages 6 - 11 30 to 45 minutes