Stories about Petra are stories about her family. About mom, dad and their daughter. About how fun and interesting it is to ride a sled down a hill with dad, paint Easter eggs and the children's room, go to the store and to the forest to pick mushrooms. And about how difficult it is to understand my mother’s strict character. Little Petra is a smart and kind girl. She protects someone else's dog from the noise and explosions of fireworks, even puts her headphones on it and finds its owner. She is an efficient assistant in household chores. And her warlike plans and pranks, such as a cake fight and threats to buy a whole bag of kittens, are very funny. The author of the book and funny illustrations, Kristiina Kass, captivates readers with a story about how cheerful and happy children grow up in a family in which they know that ice cream is the best remedy for bruises. The book is addressed to preschoolers and primary schoolchildren.