How did dr. Seuss begin writing childrens books?

Dr. Seuss, whose real name was Theodor Seuss Geisel, didn't start writing children's books right away. He began his career as a political cartoonist for the New York Evening Standard in the 1920s. He also drew advertisements and wrote for Life magazine.

However, in 1937, he faced a challenge that would change his life. He was tasked by Vanguard Press to write a book for beginning readers using only 50 words. This was a daunting task, as children's books at the time were often quite complex and dense.

Seuss rose to the challenge and wrote "And To Think I Saw It On Mulberry Street" which used only 50 different words and became a huge success. This book, and its success, convinced Seuss to focus on writing children's books, leading to a prolific and influential career that continues to entertain and educate children today.