Leonardo da Vinci has always attracted the students' fantasy: his studyings and his inventions have proved, through the centuries, the genius ability to carefully observe the natural phenomena and the important solutions he proposed to overcome the difficulties his contemporaries found impossible to face.
His genius wandered from poetry to painting, to engineering and building startegies. His flying machines  have a fascinating charme and they are valid yet. All together, studying his solutions might enrich our students today....