The instant the whirring noise begins, the quadcopter leaps from the ground and high into the sky. It’s almost faster than your eye can see. My 15-year-old son, Robert William, was excited to fly his first quadcopter. It’s a light, propeller-driven device that includes a video and still camera. The first Saturday after the drone arrived, we took it to a football field near our home. It was a bit windier than we wanted but he was too excited to be deterred.