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Glowing in the Dark
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In this activity, learners explore phosphorescence and how certain materials can absorb and store energy from a light source.
Why are Compact Fluorescent Bulbs More Efficient?
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In this activity, learners explore the relative efficiency of different bulbs, specifically incandescent vs. fluorescent.
Stereoscope
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In this activity, learners construct a device that allows them to view 2-D images in 3-D.
Kaleidoscope
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In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).
Periscope
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In this activity, learners construct a device that allows them to look over ledges or around corners.
Our Sense of Sight: How We Perceive Movement, Depth and Illusions
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In this activity, learners investigate visual perception as well as plan and conduct their own experiments.