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Camera Projector
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In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.
Periscope
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In this activity, learners construct a device that allows them to look over ledges or around corners.
Stroboscope
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In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.
Airboat
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In this activity related to Newton's Laws of Motion, learners build a boat powered by a propeller in the air.
Weather Vane and Anemometer
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In this meteorology activity, learners construct simple devices to measure the direction and speed of wind.