Nearly 400 students from a dozen Los Angeles Unified School District schools took over the Matador Gym at Cal State University Northridge on May 6 to compete in a daylong tournament to show their high-tech skills in coding, robotics and engineering. The elementary students and their creations were challenged by an obstacle course, follow-the-line, “space” challenges and “sumo” matches where robots went at it in combat. Students from Pacoima Charter, Canoga Park, Hart Street, Plummer and Victory Boulevard elementary schools were among the contestants.