The book includes several stories ("Glass of jelly," "Unexpected treasure," "Serezhkina prize," "Silence kittens," "Barn music") and the story "Pearls of the northern rivers," united by common heroes. Telling the entertaining and sometimes funny story of the boys' search for pearls, the author reveals their characters - lively, inquisitive, sympathetic - and leads the reader to the idea that real wealth is the ability to work.