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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.

$5 - $10 per group Ages 8 - 18 1 to 2 hours

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In this four-part activity, learners explore light and sound through a variety of hands-on investigations.

$5 - $10 per group Ages 8 - 14 1 to 2 hours