Drone-borne advertising is coming to one major media market — Philadelphia — and could soon be whizzing around other big U.S. cities, thanks to the efforts of a startup founded by a college student.

DroneCast, the brainchild of 19-year-old Drexel University student GauravJit Singh, attaches advertising banners up to 6 feet long by 2 feet wide to small, four-rotor drones, weighing about three pounds, which then hover or cruise around areas with heavy pedestrian or automobile traffic at a height of about 25 feet….

One of Singh’s many creative ideas for the drones involves having them cruise up and down skyscrapers within visual range of the windows allowing a local restaurant, for example, to advertise lunch specials to the office workers within.