The book includes the most famous harmful tips from all four books of 'Harmful Tips' with drawings by Andrey Martynov. Grigory Oster told about how decent children should behave at home, at school, on the street, in transport and other public places in the genre of harmful advice, which he invented himself. The writer suggests doing a lot of stupid things and assessing the consequences 'when the adults come'. But this, of course, is only for those children who do not have a sense of humor. And there are no such children in the world!For primary school age.