When he first started at Hendersonville High School in Tennessee, 15-year-old Sergio Peralta tried to keep a secret: He’d been born with a right hand that hadn’t fully formed. Over the years, he’d gotten used to doing almost everything with his left hand, but as the new kid at school, he didn’t want everyone to know. Eventually though, an engineering teacher found out—and soon three of his students offered to build a robotic hand for Sergio. Using online models and a 3-D printer, the students spent four weeks designing, sizing, and 3-D printing a
A Helping Hand

Kelly Flood/Sumner County Schools
Sergio Peralta (second from left) with students who built his prosthetic hand

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