Petson is Sad

What to do if your friend suddenly became sad? You need to immediately restore his good mood! The happiest and most inventive cat in the world, Findus, is capable of cheering anyone up, even the grumpy old man Petson. How does he manage this? With one paw!
Sven Nordqvist is a Swedish artist and writer who gained worldwide recognition for his children's books. Based on the series about Petson and Findus, animated films have been made, computer games created, and theatrical performances produced.