Simplify the following text for a Grade 7 native English-speaking person.
Original: Gumbasia , a 3 minute 34 second short film produced in 1953 and released on September 2 , 1955 , was the first clay animation produced by Art Clokey , who went on to create the classic series Gumby and Davey and Goliath using the same technique .
Simplified: Gumbasia was a clay animation movie . Clokey became famous for his two series Gumby and Davy and Goliath which also used clay animation .