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    University of Wisconsin-Madison
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    In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow. The...

    $1 - $5 per student Ages 4 - 14 1 to 4 weeks
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    American Association for the Advancement of Science
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    A group of 6 learners works together as a team with each learner performing a different role. Together, they need to maneuver a die through a maze. After accomplishing the task with all roles, one...

    1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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    WGBH
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    In this design challenge activity, learners build a machine out of cardboard that runs smoothly and dependably. Learners must be precise to make sure their component works properly. This activity...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    American Museum of Natural History
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    In this game, learners each represent a different organism in an environment. They build a web during the activity, and discover how all the players in an ecosystem depend on each other. As they...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    Science Museum of Minnesota
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    This is a demonstration you can use to show learners how valves and pumps work in concert to move blood through the circulatory system. <b>[Activity is publicly available through a web...

    1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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    Science Museum of Minnesota
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    By building a model of a lung and diaphragm, learners discover the function of various parts of the body's respiratory system. The model uses common items - a plastic bottle, a balloon, and a...

    1 cent - $1 per student Ages 8 - 18 45 to 60 minutes