character: Penny the Physicist
topic: Mechanical Advantage
grade: 2
subject: Science
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character: Penny the Physicist
topic: Simple Machines
grade: 2
subject: Science
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character: Penny the Physicist
topic: Forces and Motion
grade: 2
subject: Science
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character: Penny the Physicist
topic: Levers and Fulcrums
grade: 2
subject: Science
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