The average American spends six hours a day gazing passively at television. Soon he will have an opportunity to play a more active role in what appears on the screen of his set. Last week the Magnavox Co. demonstrated a device that will give set owners a chance to engage in electronic table tennis, hockey, target shooting and other competitive games on their TV screens.
Called Odyssey, the game is actually a battery-powered, closed-circuit broadcaster that projects movable squares of light on a TV screen. The light squares—which can be maneuvered in any direction by dials on two small "player control units"—represent...