From A History of Video Games in 64 Objects:
Due to technological limitations, Baer’s console could only display three moveable dots on a black screen. For "graphics," players had to attach col-
ored transparent plastic overlays to the screen,
such as a tennis court or the outline of a maze.
Some assembly required.
Baer dubbed his invention the “Brown Box" named for the faux wood self-adhesive hastily applied to the box’s siding to seem more appealing to investors.
Faux wood paneling is practically a blessing upon humanity compared to its modern-day equivalent, blockchain.