A 3-year-old boy was struck by a stray bullet during an attempted robbery Saturday on the Near West Side.About 4:50 p.m., a gunman approached a 20-year-old man in a parking lot in the 1000 block of West 14th Street, demanded his property then fired shots into the air, Chicago police said.The boy, who was inside an apartment nearby, was shot in the left ear, police said. He was taken to Stroger Hospital in fair condition.The shooting happened near the University of Illinois at Chicago outdoor field complex.No one else was injured, and no arrests were reported.