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Measure the Sun's Size

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In this activity, learners make their own pinhole viewer in order to measure the size of the sun.
$1 - $5 per group Ages 8 - adult 10 to 30 minutes

Slide Rules

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Learners make their own simple slide rules out of paper and learn how they work.
1 cent - $1 per group Ages 8 - adult 10 to 30 minutes