Leonardo da Vinci's apprentice Salai gets into the Centre of technological support of Moscow education by using master's time-travel machine. Here, together with kids and modern digital technologies: 3D printers, 3D scanners, laser cutting machines and other gadgets, they get to rebuild machines and mechanisms of the great engineer, artist and scientist Leonardo da Vinci. With the help of special app for smartphones and tablets, readers will be able to see the greatest inventions of Leonardo, animated by technologies of augmented reality. The book is made for children of early and middle age, who learn new digital technologies and eager to know more about Leonardo da Vinci's creation. We invite all the readers to exhibition "Leonardo in 3D", that will be taking place in territory of an old Moscow manor Lublino, near the amazing castle. The castle, just like the exhibition, reminds us of Italy culture and art, and his original architectural decision echoes with extraordinary ideas of the great Leonardo da Vinci.