Aptly named PONG, this tabletop version does away with electronics in favor of real knobs, paddles, springs, and plywood. Think of it as when air hockey meets pinball and ping pong. Continue reading for a video demonstration.

Finally, the top and bottom walls of the PONG playing field are “springy”, so that the ball can bounce off of them. To achieve the elastic wall effect, the Scientists glued beryllium copper finger strips.

[via Technabob]