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    Children's Museum Of Houston
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    In this activity, learners explore why humans sweat. Learners compare the effects of heat on a balloon filled with air and a balloon filled water. This simulation demonstrates how water in sweat...

    1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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    Twin Cities Public Television
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    In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch...

    free Ages 6 - 14 5 to 10 minutes
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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