Light was Ohm's food. He craved it as humans crave food, drink, companionship. Craig had built a special home for his creature--a brilliantly lighted hutch where it could creep to recharge the batteries which gave it movement and power. * * * * * Looking down at his pet, Craig felt a sudden, overwhelming sense of possession. Ohm was perfect. His shiny steel shell glistened in the bright laboratory light. Under that shell were three wheels and two battery-powered motors--one for creeping and one for steering. A delicate brain and nervous system fashioned of condensers and relays would motivate Ohm. Craig was surprised to note that his hands were trembling slightly as he made the final connections. The scene with Sheila had perhaps made more of an impression than he had thought; and then, too, this was his big moment ... the moment toward which he had worked for months. Connections completed, he struggled to lift Ohm to the floor. Though Ohm was relatively small--he stood just hip-high and was perhaps three-and-a-half feet long--he was surprisingly heavy. Craig Stevens stepped back and waited. If his calculations were correct, Ohm would now begin his search for light. He would move about the lab ... guided by his photo-electric eye ... seeking the gratification which only strong light could give. Absolute silence held the laboratory. Had he been wrong? Had he miscalculated? He stared at the unmoving creature. He willed it to move. He would not be defied by this mass of steel and wire. Move, he commanded it. Move! Slowly, with a slight jerking motion, Ohm began to move forward. Like an animal that has been sleeping and is still groggy with dreams, it moved--hesitated--then moved again. Craig Stevens sighed with satisfaction. His calculations had been correct. Ohm lived. The creature was moving more rapidly now across the room. As it gained momentum, it was confronted suddenly with a lab table. With a painful little thump, it collided with the table leg. Then, there was a faintly ominous growling noise, and Ohm backed away and set out in another direction. Fascinated, Craig followed the creature from room to room. When Ohm discovered a patch of bright light, he would pause and bask momentarily in its brilliance. His contentment and deep satisfaction were apparent. At last, by a process of trial and error, Ohm came to the hutch that Craig had built. Eagerly, he pushed his way to the door and quickly glided in. After satisfying himself that Ohm was comfortably installed, Craig dropped the wire grating over the hutch. His new pet was at home. The next few weeks were busy ones for Craig and Ohm. Countless experiments were tried, and in every case, the robot was a model subject. His potentials seemed unlimited. Craig was asked to give a special lecture and demonstration at the University, and his audience of scholars and research experts were delighted with Ohm.