Etch A Sketch

Etch A Sketch is a registered trademark for a mechanical drawing toy manufactured by the Ohio Art Company.
An Etch A Sketch is a thick, flat gray screen in a plastic frame. There are two knobs on the front of the frame in the lower corners. Twisting the knobs moves a stylus that displaces aluminium powder on the back of the screen, leaving a solid line. The knobs create lineographic images. The left control moves the stylus horizontally, and the right one moves it vertically.
The Etch A Sketch was introduced near the peak of the Baby Boom, and is one of the best known toys of that generation. It was inducted into the National Toy Hall of Fame at The Strong in Rochester, New York, in 1998. In 2003, the Toy Industry Association named Etch A Sketch to its Century of Toys List, a roll call commemorating the 100 most memorable and most creative toys of the 20th century. It remains popular to this day.