Skill based gambling machines have been around for 60+ years. "Bingo Pinball Machines" have been around since the mid 50's. For those of you that have never heard of or seen one, here's a YouTube video that explains it. Basically, the more nickles (or what ever denomination it uses) you put in, you build up your game odds or game features. Then you have to get a minimum of three numbers connecting in a row (or section) to win. The more numbers you get in a row, the more you win. Here's a YouTube video that shows the game in action. He's taken off the top glass to put the balls in the holes to get winners to show you how it works. in the "real world" you have to shoot the ball to the side of the machine your winning numbers are located. You then shake the machine to direct the ball into the right hole when it gets close. There are no "flippers" so you have to be really good in order to win. https://www.youtube.com/watch?v=ouwNvH3OVrs If you have any other questions about the game, fire away. I've played one since I was 5 years old and had to stand on a chair to watch the balls roll around. Naturally, at that age, I couldn't shake the machine. Ray