up at 4:30 every morning to deliver the Times before school and repeated the round for the evening Star after school. The schedule was exhausting, and Disney often received poor grades after falling asleep in class, but he continued his paper route for more than six years. He attended Saturday courses at the Kansas City Art Institute and also took a correspondence course in cartooning. In 1917, Elias bought stock in a Chicago jelly producer, the O-Zell Company, and moved back to the city with his family. Disney enrolled at McKinley High School and became the cartoonist of the school newspaper, drawing patriotic pictures about World War I; he also took night courses at the Chicago Academy of Fine Arts. In mid-1918, he attempted to join the United States Army to fight the Germans, but he was rejected as too young. After forging the date of birth on his birth certificate, he joined the Red Cross in September 1918 as an ambulance driver. He was shipped to France but arrived in November, after the armistice. He drew cartoons on the side of his ambulance for decoration and had some of his work published in the army newspaper Stars and Stripes. He returned to Kansas City in October 1919, where he worked as an apprentice artist at the Pesmen-Rubin Commercial Art Studio, where he drew commercial illustrations for advertising, theater programs and catalogs, and befriended fellow artist Ub Iwerks. Career Early career: 1920–1928 In January 1920, as Pesmen-Rubin's revenue declined after Christmas, Disney, aged 18, and Iwerks were laid off. They started their own business, the short-lived Iwerks-Disney Commercial Artists. Failing to attract many customers, Disney and Iwerks agreed that Disney should leave temporarily to earn money at the Kansas City Film Ad Company, run by A. V. Cauger; the following month Iwerks, who was not able to run their business alone, also joined. The company produced commercials using the cutout animation technique. Disney became interested in animation, although he preferred drawn cartoons such as Mutt and Jeff and Max Fleischer's Out of the Inkwell. With the assistance of a borrowed book on animation and a camera, he began experimenting at home. He came to the conclusion that cel animation was more promising than the cutout method. Unable to persuade Cauger to try cel animation at the company, Disney opened a new business with a co-worker from the Film Ad Co,