This paper examines the role of humor in children's literature, using Mo Willems's picture books as primary examples. Drawing on research by Nilsen, Zbaracki, and Mallan, the study argues that humor engages children emotionally and cognitively, encourages reading, and helps young readers cope with everyday experiences. Through close readings of titles such as Knuffle Bunny, Don't Let the Pigeon Stay Up Late, and Goldilocks and the Three Dinosaurs, the paper identifies specific humorous techniques — including surprise endings, cliffhangers, visual comedy, and playful language — that Willems employs to draw children into stories while also teaching them meaningful lessons.
This study examines why humor is important in children's literature and how Mo Willems uses humor in his picture books. Don Nilsen (1993) stated that humor "is a very important aspect of much of children's and adolescent literature" (p. 262, cited in Zbaracki, 2003). Zbaracki writes that it is "perhaps…this discovery of characters and the different forms of humor that Kappas (1967) discovered years ago that draws children into reading" (2003, p. 3). Children's literature has long relied on humor as a primary tool for drawing young readers into stories, and Mo Willems's work offers a rich contemporary example of that tradition in action.
Mo Willems utilizes humor in his children's books in order to engage children in the story, in learning, and in the pursuit of reading. For example, in Willems's book Hooray for Amanda and Her Alligator!, a girl named Amanda has a best friend who is an alligator. Amanda surprises the alligator with books — and the alligator surprises Amanda by eating them. Studies have shown that "children were highly engaged in reading material when the material was a humorous children's book" (Zbaracki, p. iii).
Mo Willems's story Knuffle Bunny follows a little girl named Trixie who goes across town to the laundromat with her father, carrying her stuffed toy Knuffle Bunny the entire way. Trixie and her father put the laundry in to wash and then head home. On the way, Trixie realizes she has forgotten Knuffle Bunny and begins saying combinations of unrecognizable words — which her father, of course, cannot understand. Trixie cries, screams, and pitches a fit. When they arrive home and her mother opens the door, her first question is "Where is Knuffle Bunny?" The entire family then races at breakneck speed back to the laundromat. When they finally locate Knuffle Bunny, the first real words Trixie ever speaks are "Knuffle Bunny!"
The illustrations in this story are particularly humorous: one image shows Trixie in the laundromat helping her father, accidentally slinging a bra around in one hand, while another depicts the whole family running past passersby in their frantic dash back to the laundromat. These visuals engage not only children but adults as well. As Mallan (1985) observed, "humor has a chameleon-like nature; it changes from one context to the next, from one moment to another. Young children are interested in the way language works."
Mo Willems's book Cat the Cat, Who Is That? is a story in which a cat is asked "Who is that?" as various other animals are introduced, and the cat informs the reader who each one is. The illustrations are entertaining, and it is easy to see how children would be quickly engaged. Studies have additionally shown that children "expressed an awareness of the emotional appeal of humor and its function of helping them cope" (Zbaracki, p. iv). Mo Willems consistently leverages simple, repetitive language patterns to invite participation from young readers, making humor an interactive experience rather than a passive one.
"Cliffhangers and surprise reversals build suspense"
"Funny stories convey warnings and moral lessons"
"Humor deepens reading engagement and social sharing"
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