At the beginning of G. Oster's third book, 'Harmful Advice,' there is a warning: 'DANGEROUS FOR THE BRAIN' of obedient children (that's why it's recommended to tie children to a chair, just in case).

But, as we already know, harmful advice has never harmed anyone, and therefore the book is absolutely safe and is perfect for reading not only to children, but also to parents and teachers.
Illustrations by A. Martynov.
For primary school age.