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    Children's Museum Of Houston
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    In this activity, learners create air cannons out of everyday materials. Learners use their air cannons to investigate air as a force and air pressure. The activity page includes a fun how-to video...

    $5 - $10 per student Ages 6 - 18 30 to 45 minutes
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    Twin Cities Public Television
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    In this quick activity (page 2 of PDF), learners will model how large depressions near the top of a volcano are formed by using an inflating and deflating balloon submerged in flour. The model...

    $5 - $10 per group Ages 8 - 14 30 to 45 minutes