Little Toot is my all time favorite character from Melody Time & he is very cute. This segment served as the basis for a show called Tugs, which happens to be the criminally underrated sister show of Thomas & friends that was made in 1989 by the former maker of Thomas, David Mitton. The series Tugs, involves two fleets known as the Star tugs & the Z stacks. Sadly the series lastest with only 13 episodes & a single season, due to bankruptcy of it's distributor, Television South. I believe that Little Toot looks very similar to the protagonist of Tugs, Ten Cents, due to his hat, color & whistle.
Review of Little Toot
