“Making and taking things apart is a very common ‘cleverness’ of boys,” write Ros Bayley and Sally Featherstone in The Cleverness of Boys. Easton LaChappelle, 17, is no exception. What sets him apart are the things he makes. What he says started as a “cool idea”—a glove-controlled robotic hand—has now evolved into a prototype of a prosthetic arm. And his work is garnering nationwide attention.