Mr. B Natural

Mr. B Natural is a short sponsored film produced in 1956 by Kling Film Productions for the C.G. Conn Company, directed by Phil Patton. It is also the name of the films main character, played by Betty Luster.

Mr. B Natural is an androgynous figure, a hep pixie who is meant to embody the spirit of fun in music. In this capacity, the character inspires children to take up band instruments. The name is a pun on the musical notation B B natural, as the character explains thats what your feelings of music are, as natural as you can be.The character also acts as a kind of nascent brand mascot for C.G. Conn musical instruments, though Mr. B Natural made no appearances for the company beyond the one film. ........

Source: Wikipedia