The battery-powered game-playing gadgets of the 1970s were huge. Then they all went away. With one exception that manages to be both timeless and timely.
Tech giants Google, Microsoft, and eBay all use blue, yellow, red, and green as their logo colors. But those hues made an indelible mark on consumer tech 40 years ago with a product from Milton Bradley, a board-game company with roots stretching back to the Civil War. The colors differentiated the four wide plastic arcs on the face of an electronic party game called Simon.