On Target

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Modify a paper cup so it can zip down a line and drop a marble onto a target. In this challenge, kids follow the engineering design process to: (1) modify a cup to carry a marble down a zip line; (2) attach a string to tip the cup; (3) test their cup by sliding it down the zip line, releasing the marble, and trying to hit a target on the floor; and (4) improve their system based on testing results.

Tags: motion, moon, challenge, design process, mass

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