Mom Mu likes to try everything new. This time she goes to the pool and gets a prize. Her friend Krax is afraid of water and can't swim, but he also wants a prize. What should be done? There is a way out: you just need to remember that everyone has their own strengths and weaknesses.Books about Mama Mu and Krax have been translated into 30 languages and are known all over the world. Their authors are Yuja Wislander, an honorary member of the Swedish Academy of Children's Books, and Sven Nordqvist, who gained worldwide fame thanks to books about Petson and Findus.