The cards are designed with adorable zoo animals for each number from 0 to 8, so children as young as 3 can find the right card. Since the game can be played with three different levels of difficulty, it keeps pace with child development. The players try to place all their cards as quickly as possible so that they match the card on top of the pile - either by colour or by animal or number. Very important: If you only have one card left in your hand, you have to shout "UNO"!