character: Builder Ben
topic: The Role of Friction in Building Machines
grade: 6
subject: Science
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character: Engineer Emily
topic: Understanding Forces in Machine Building
grade: 6
subject: Science
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character: Scientist Sam
topic: The Importance of Lubrication in Reducing Friction
grade: 6
subject: Science
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character: Inventor Ivy
topic: How Different Materials Affect Friction in Machines
grade: 6
subject: Science
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