 His most notable creation was Miffy ("Nijntje" in the original Dutch), a small rabbit drawn with heavy graphic lines, simple shapes and primary colours.Bruna also created stories for characters such as Lottie, Farmer John, and Hettie Hedgehog.Aside from his prolific catalog of children's books, Bruna also illustrated and designed book covers, posters and promotional materials for his father's publishing company A.W.