David Zinn, who was born in Ann Arbor, Michigan, has a special hobby since he was a child - he likes to read cartoon children's books, especially the cute cartoon animals in the books. The more I saw it, the more I wanted to draw. He begged his mother to buy some children's drawing books, and after finishing his homework every day, he copied a picture from the books. Although self-learning to draw is very hard, it also brings him a lot of unexpected fun, especially when one cartoon ...