The book is largely similar to the popular books "Entertaining Physics" by Y.I. Perelman, "Mathematical Wonders and Mysteries" by M. Gardner, "In the Realm of Ingenuity" by E.I. Ignatiev, "Mathematical Ingenuity" by B.A. Kordemsky, and others. It contains a large number of diverse entertaining logical puzzles and riddles, interesting facts, useful programs, simple computer games, tricks, and more. The book's materials cover a wide range of topics in informatics, computing technology, and information and communication technologies (number systems, information encoding, logic, programming basics, the Internet, etc.). These materials can be used both in the educational process and for extracurricular work with students. For everyone interested in informatics.