Tatu ja Patu – Virheistä viis has cards with two pictures. Players must find 5, 10 or 15 differences in the pictures and mark them on the cards with whiteboard pens. Players score 0-5 points depending on how many differences they find. There are several rounds played until someone gets 25 points. The game art is based on popular Tatu and Patu children's books by Sami Toivonen and Aino Havukainen. The game play is based on Spot the Difference from University Games.