"Practical Mechanics for Boys" is a book written by James Zerbe that will be useful for all little inventors and craftsmen. This book contains all the necessary information about various mechanisms, simple machines and the basics of mechanics. The child will learn about the physical laws that govern our world and will be able to easily apply them in practice. The book is written in an interesting and accessible way, which makes it an ideal resource for learning the basics of mechanics for boys of all ages.