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    The Exploratorium
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    Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen. Brought to you by the Exploratorium's...

    1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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    IEEE
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    In this activity, learners explore how pens have been engineered and re-engineered over time. Learners work as a team to develop a working pen out of everyday items. They sketch their plans,...

    $10 - $20 per group Ages 8 - 18 1 to 2 hours