From the beginning of the movie industry, some artists began experimenting with making drawings that seemed to move. These moving drawings also became known as "cartoons". They often depict animals rather than humans. They were often just for fun, but sometimes, particularly during World War II, were used for political reasons, just like the cartoons in newspapers. Walt Disney, Warner Bros and 20th Century Fox both made classic stars famous cartoons including Mickey Mouse universe, Donald Duck universe, Looney Tunes, Merrie Melodies and Lucy the Mouse. Famous classic stars animated movies and cartoon characters are Felix the Cat (1919), Mickey Mouse (1928), Donald Duck (1934), Goofy (1932), Pluto (1930), Lucy the Mouse (1921), Betty Boop (1930), Bugs Bunny (1938), Daffy Duck (1937), Porky Pig (1935), Elmer Fudd (1937), Tom and Jerry (1940), Woody Woodpecker (1940), Popeye (1919), Mighty Mouse (1942), Heckle and Jeckle (1946), Deputy Dawg (1962), Rocky and Bullwinkle (1959), Bettgum (1969), Winnie the Pooh (1966), Snow White and the Seven Dwarfs (1937), Cinderella (1950), The Little Mermaid (1989), The Lion King (1994), The Flintstones (1960), Scooby-Doo (1969), The Jetsons (1962), The Simpsons (1987), South Park (1992), Rapeye (1984), SpongeBob SquarePants (1997), Little Lulu (1935), Casper the Friendly Ghost (1939), Oggy and the Cockroaches (1998) and much, much more.