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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

free Ages 6 - 18 Under 5 minutes
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In this activity (11th activity on the page), learners use pennies to test their hearing acuity.

free Ages 6 - 18 10 to 30 minutes
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This is a quick and simple demonstration about reflexes (second activity on the page).

free Ages 4 - 18 Under 5 minutes
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In this activity (7th activity on the page), learners use their sense of touch to identify mystery objects hidden in socks.

free Ages 4 - 18 5 to 10 minutes