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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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    The Exploratorium
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    In this activity, learners create and experiment with wind tubes. These tubes are a playful and inventive way to explore the effect that moving air has on objects. Construction uses everyday...

    Over $20 per group Ages 4 - adult 1 to 2 hours
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    University of Wisconsin-Madison
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    Learners make kimchee or sauerkraut, which is really just fermented cabbage, in a 2-liter plastic bottle. The fermentation process takes from 3 days to 2 weeks to complete, and learners measure the...

    $1 - $5 per group Ages 4 - 14 1 to 4 weeks
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    Lawrence Hall of Science
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    In this set of outdoor games, learners increase their awareness of the outdoor environment by going on a scavenger hunt and an out-of-place hunt. In the first game, learners hunt for things like...

    $5 - $10 per group Ages 4 - 11 1 to 2 hours
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    University of Wisconsin-Madison
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    In this activity, learners turn empty 2-liter bottles into a see-through compost container. Through the sides of the bottle, learners make weekly observations of decomposition over the course of...

    $1 - $5 per student Ages 4 - 14 1 to 12 months