To give its correct French name "Le Ballon Rouge". Have just rewatched this classic after a gap of 50+ years and am as intrigued as ever as to how this sort of thing was done in the days of film.
It is on You Tube but best watched in full def. An interesting pictorial of the streets of Paris in the 50's on its own, the animation could no doubt be replicated today by many Vegas users. But how then???
By the way it won an Oscar in 1956.
Brian