The main aim of this thesis is to describe the particular features and reasons why these sports should be practised by people in different age groups and gender, but mostly by preschool children. The second aim is to describe the positive impact on motoric, functional and social skill development as well as the most important atributes of these two sports. Jigoro Kano realized it was harder for him to make a significant progress because he was physically frail and weak. He decided to develop a martial arts technique by which a weaker person might overcome a larger and stronger opponent. After studying ju jitsu technique, Jigoro Kano realized it was the most effective for mind and body training, but needed to be improved in order to become more suitable. Integrating efficient techniques of different ju jitsu schools with his own, he established a system of physical exercise which he named Kodokan Judo.