Three cups, and one of them contains a yellow ball. Can you tell which one it is? Things are getting more complicated though. Before you can speak your mind, the position of the cups will change, including the one with the ball. In this way, remember the cup with the ball and observe this cup as it changes positions with the other cups. Once the swap is complete, uncover the glasses and see if you picked the right one.
And if Magic Cups can be an interesting game, it's important to remember that it's usually a game of con artists and street entertainers trying to get money out of people. This is why it is important to be careful and avoid this game if you suspect it is a scam. Here you can play it without fear of being cheated :)
