In the detective game, the cards are stacked on top of each other so that their front sides cannot be seen. Then, the cardboard floor consisting of 9 pieces is placed appropriately in the middle. The bell is placed on the part of the cardboard floor with a bell picture so that the players can reach it. Cards are opened in order, starting from the top card. After seeing the shape on the game card, the first person to find the shape on the cardboard on the ground rings the bell. The card game stays with the winner. Some cards have 3 and 2 shapes. After all the shapes on these cards are found, the player presses the buzzer. Nothing should be said to the other players before finding all 2 or 3 shapes on the card. In case the bell is pressed incorrectly, the game continues. The player who collects the most points wins the game.