... The technology is based on the phenomena of physics. Physics represents a vast field for children's amateur performances. But just in this area so far there has been a yawning gap: there has not been a single book describing experiments in physics on homemade devices. Physics in Games, offered to young readers, is intended to partially fill the gap noted. This is not a physics textbook. B. Donat sets himself the task not so much to teach physics as to captivate this most interesting science. He considers the most suitable means for this to be an entertaining physical experience, almost a trick with which the experimenter can entertain and amaze his comrades...