All very simple, deep in my childhood. No tricks and fraud. Before you 3 cups placed on a billiard table. all you need in this game is mindfulness. When the ball rolled under one of the glasses, watch him. If after all the shenanigans you guessed in which ball you score. We value you think that this rate is too low for you, you can enlarge it, for that would test himself. Playing this game do not forget to blink sometimes even that would not tired eyes.