The book is intended for children seven to ten years old. It is their behavior that most often irritates others: they laugh too loudly, move too erratically... But they don’t do it on purpose! They simply don’t know the rules, they don’t know how to correlate their behavior with the mood of those around them. The book will tell you how to behave at the table and in the theater, in your own home and in the forest, and why exactly such rules eliminate unnecessary conflicts from life. The heroes of the book - Tyunechka and Kuzdryamchik - with the help of the wizard Professor Bonus, will plunge into the depths of centuries, study the customs of different times and peoples. This is a real "Academy of Polite Sciences". It will be useful for both parents and secondary school teachers - everyone who wants to make life a daily, unobtrusive and entertaining lesson in morality.