Eric Carle was inspired to write children's books by his love of nature and exploring as a child. Some of his most famous characters, like the hungry caterpillar, were based on animals he observed in the forests and castles near his hometown in Germany. Carle believed in using simple words and bright colors in his books, an approach influenced by his art teacher who introduced him to expressionist art. Throughout his career, Carle published over 70 books and won several awards, but his most popular was The Very Hungry Caterpillar. The document then provides examples of activities teachers can do to engage children with Carle's books.