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    The University of Texas McDonald Observatory
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    In this three part activity, learners explore and experiment with shadows to learn about the Sun's relative motion in the sky. Learners will trace, measure and compare their shadows over time,...

    1 cent - $1 per group Ages 4 - 11 1 to 2 hours
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    University of Washington
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    This activity demonstrates the importance of wearing a helmet to protect the brain. An egg is used to symbolize a head with the shell as the skull and the inside of the egg as the brain. One egg is...

    1 cent - $1 per group Ages 4 - 14 10 to 30 minutes
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    U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy
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    In this activity, learners model the flow of energy from the sun as it enters a photovoltaic cell, moves along a wire and powers a load. The game-like atmosphere engages younger learners and helps...

    $5 - $10 per group Ages 4 - 11 10 to 30 minutes