Mentor David Black helps his students Joshua Valerio, 14, and Sairkiran Ramanan, 16, of Circuit Breakers 696, work the conveyor system they designed to move basketballs into position to be shot from the robot they and their team designed at Clark Magnet High School in La Crescenta on Monday, February 20, 2012. A team of 30 students build a robot named Queen Hannah's Revenge for the FIRST Robotics Regional Competition they will participate in later in March.