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Finding the Size of the Sun and Moon
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In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon.

Animal House
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The goal of this activity is to design, build and test a house or toy for an animal.

Pop Can "Hero Engine"
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In this activity, learners build water-propelled engines from soft drink cans.

Building Tall
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In this engineering activity (page 2 of PDF), young learners investigate how a wide base can make a building more stable. Learners use blocks or boxes of different sizes to construct stable towers.