Question: What type of art started as a flip book in early times but has been used to make films such as "Life is Cool" in 2008?
Sentence (from "Korean animation"): The art of Korean animation (Korean: 한국 애니메이션 ), or Aeni (Korean: 한국 애니 ) has gone from hand-held flip books in early times to studios that produce work for major American and Japanese animation companies.
Relevant evidence: Yes