Walt Disney's signature creation, Mickey Mouse, in his breakout 1928 cartoon short, "Steamboat Willie." (Photo: ©Walt Disney/Courtesy: Everett Collection) He may have hit the big 9-4 in calendar years ...

He may have hit the big 9-4 in calendar years, but Mickey Mouse is forever young in the hearts of kids, parents, grandparents and even great-grandparents. The signature creation of Walt Disney — and ...