The deck consists of 15 cards each card has the same 15 objects but each object has colour variations and is in various locations on the cards.
Any two cards always have one (and only one) object that is exactly identical in color.
All players play at the same time. Be the first to find this pair and say the name of the object and point it out.
If correct, the player takes one of the cards as reward. The player with the most cards, when all run out wins!