Throughout the ages, kites have captured the imagination of millions. From the Chinese over three thousand years ago up until the researchers of today, kites have played a role in the fields of science, religion and entertainment. During the twentieth century, more and more scientific knowledge was being applied to kites and people are discovering new techniques and new applications for this old idea. At the ASSET chair (AeroSpace for Sustainable Engineering and Technology), under supervision of Prof. Dr. Wubbo Ockels, we look at kites in a scientific manner. We want to understand and control kites so they can be used in a number of applications such as the generation of sustainable energy and the propulsion of ships.