His tiny students popped up from the floor of their classroom at Conshohocken's Ridge Park Elementary School and sat at desks with tablets or computers, opened the program, then clicked on arrows to make a colorful fuzz ball move around the screen. They were first graders, barely done learning their ABCs, but their Montgomery County school was launching them into a new orbit of computer coding that it is hoped won't end until they land a high-tech job, or at least one that requires programming skills.