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        4-6

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        Trebuchet

        Angus and Jonathan are into really old-school stuff: medieval history! When they're not building castles, playing joust, or reading about knights, they're engineering stuff. They're most recent invention is called a trebuchet, a slingshot-like tool dating back to medieval days that is useful for transporting materials (translation: flinging stuff) long distances. They want to throw out this DragonflyTV question: What trebuchet design will allow us to throw things the farthest?

        http://pbskids.org/dragonflytv/

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