Simplify the following text for a Grade 3 native English-speaking person.
Original: Gumby was created by Art Clokey while a student of Slavko Vorkapich at the University of Southern California . Clokey and his wife , Ruth ( nÃ e Ruth Parkander ) , invented Gumby in the early 1950s at their Covina home shortly after Art finished film school at USC .
Simplified: Gumby was started by Art Clokey in 1953 .