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    American Association for the Advancement of Science
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    In this online game, learners build complicated machines to complete simple tasks. The game starts with a power source on one side of the screen and the task on the other side. Learners select...

    free Ages 8 - 11 5 to 10 minutes
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    WNET
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    In this fun hands-on activity learners explore a simple machine: the lever. What happens to a load when you multiply the length of a lever? Find out here! The activity is related to an episode of...

    $1 - $5 per student Ages 8 - 11 45 to 60 minutes
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    WGBH
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    In this project, students explore how levers work, by making a puppet with moving limbs. After showing students how to make the arms, students are challenged to construct the rest of the puppet on...

    1 cent - $1 per student Ages 6 - 11 30 to 45 minutes
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    WGBH
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    In this activity, learners build a simple tabletop seesaw to test how different variables (the position of the fulcrum, distance, weight) affect its balance under increasing weight loads. Extension...

    1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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    New York Hall of Science
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    Build a car that runs on air. Using household materials, experiment with the power of air to create thrust powerful enough to move a homemade car. This activity allows you to explore a range of...

    $1 - $5 per student Ages 4 - 11 5 to 10 minutes
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    Children's Museum of Indianapolis
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    In this activity, learners explore work, forces, simple machines, and construction. This lesson guide includes simple ways to demonstrate these principles as well as hands-on activities. For...

    $1 - $5 per group Ages 4 - 8 1 to 2 hours
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    Center for Engineering Educational Outreach, Tufts University
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    Engineer and cartoonist Rube Goldberg is famous for his crazy machines that accomplish everyday tasks in overly complicated ways. Learners use their understanding of simple machines to design and...

    $1 - $5 per group Ages 11 - 14 1 to 2 hours
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    COSI
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    In this physics activity, learners experiment with pulleys and find that they can decrease the effort needed when using a pulley to lift or move different loads. This is an excellent activity to...

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