Here is another John Hubley concept from ROOTY TOOT TOOT. This one is an original whereas the previous image was a color xerox.

(click on image for larger version)

The July 1951 edition of HARPER’S BAZAAR had a two-page spread about ROOTY TOOT TOOT. The article had a half-dozen of John Hubley’s concept sketches, along with the following photo of Hubley and the film’s choreographer Olga Lunick, whose movements were filmed as reference for the animators.