For those who have no idea who Gumby is, here's a paragraph from Wikipedia:
Origins of Gumby
Gumby was created by Art Clokey while a student of Slavko Vorkapich at the University of Southern California. Clokey's first animated film was a 1953 3-minute short called Gumbasia, a surreal montage of moving and expanding lumps of clay set to music in a parody of Disney's Fantasia.Gumbasia was created in a style Vorkapich taught called Kinesthetic Film Principles. Described as "massaging of the eye cells," this technique of camera movements and editing was responsible for much of the Gumby look and feel. In 1955 Clokey showed Gumbasia to movie producer Sam Engel, who encouraged him to develop his technique by adding figures. Of the three pilot episodes of Gumby, the first was done by Clokey on his own, and the next two were done for NBC and shown on The Howdy Doody Show to test the audience's reaction. Clokey and his wife Ruth (nÃ©e Ruth Parkander) came up again to the character Gumby, and Clokey. He made a pilot with Gumby, but they later made a second 15-minute pilot later titled "Gumby Goes to the Moon". NBC executive Thomas Warren Sarnoff liked the idea but rejected the pilot episode. The third Gumby episode, "Robot Rumpus", made a successful debut on the Howdy Doody Show in August 1956, and in 1957 Gumby was given his own NBC series.
Gumby was inspired by a suggestion from Clokey's wife Ruth that he base his character on the Gingerbread man. Gumby was green simply because that was Clokey's favorite color. Gumby's legs and feet were made wide for pragmatic reasons: they ensured the clay character would stand up during stop-motion filming. The famous slanted shape of Gumby's head was based on the hair style of Clokey's father in an old photograph.