Sounds like an old shell game you see with 3 walnut shells and a pea. lol.
The shell game (also known as thimblerig, three shells and a pea, the old army game) is often portrayed as a gambling game, but in reality, when a wager for money is made, it is almost always a confidence trick used to perpetrate fraud.[1] In confidence trick slang, this swindle is referred to as a short-con because it is quick and easy to pull off.[