During the Human Body Systems Unit, 7th grade science students combined science and engineering in order to construct biomechanical hands out of cardboard, straws, rubberbands, and tape. They all start by following directions to build the hand from NASA's activity, I Want to Hold Your Hand. Then they were challenged to use their knowledge of the skleletal and muscular systems to make modifications to the original design to increase strength and/or dexterity.
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