The book is based on descriptions of the most interesting games and toys developed by radio amateurs in recent years. The main attention is paid to specific practical recommendations for the manufacture and installation of structures. At the same time, some information from the basics of radio engineering and automation, necessary to understand the principle of operation of individual devices, is also given. The book is designed for a wide range of radio amateurs. It can also be useful to heads of radio circles of schools and extracurricular institutions.