New Canaan kids as young as those in elementary school are exposed to and experimenting with e-cigarettes, inhaling the aerosols produced by vaporizers in an increasingly prevalent practice known as “vaping,” officials said Monday night. Though long-term health effects aren’t yet known, vaping increases heart rates and blood pressure and is “kind of terrifying” in its use among kids, New Canaan Police Officer Jeff Deak told members of the Board of Education at their regular meeting. “Quite honestly, the kids think it’s a safe alternative” to cigarettes, Deak, the school resource officer at Saxe Middle School, said at the meeting, held in the Wagner Room at New Canaan High School. “It has stretched down to elementary school,” Deak said. He added: “Some of the kids just think it’s fun—it’s fun to blow white smoke in the air.