Using it is a little like playing one of those claw games, only way more satisfying. Also, it's illegal.
Unlawfulness aside, you've really gotta hand it to YouTuber Ioduremetallique for his sheer mechanical ingenuity. This is one cleverly designed little robot, a fact this video demonstration makes perfectly clear (even if it's narrated in French). Skip to the 1:20 mark to see it in action.