Vex robotics 406 4211 catapult by hexbug vex 406 4211 p in 100bc greek and roman engineers changed the face of battle with the invention of the most powerful long range weapon the world had ever seen now students everywhere can experience the thrill of launching objects with the new vex reg robotics catapult by hexbug reg p p inspired by ancient greek and roman designs this modern catapult has a ratchet winch that can control the distance projectiles are thrown crank the winch to it