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We need cups and a cap.It is a great game and kids love to play it.It is quick and easy.You put the cap under a cup - hide the cap and make questions until you find it For example: You can use grater than or less than that the ordinal number you chooseYou start with- I THINK THAT THE CAP IS UNDER THE SECOND CUP- NO IT IS NOT. So you must take the cap. and then you ask IS IT LESS or higher value THAN THE SECOND? If the answer is less , you have to eliminate all the higher.