Harcourt asked me to think of ideas for their newly-launched series of study little board books. Moo-Ha! grew out of my book, The Cow That Went Oink. In that book, the other cows that went moo laugh at the cow that went oink. "Moo-ha!" "Moo-ha!" "Moo-ha!"
The other animals on the farm laugh at her, too: "Neigh-ha!" "Hee-haw-ha!" "Quack-ha!" But at the end of the book, the cow that went oink learns how to moo. She knows how to oink and moo, so she has the last laugh: "Moo-ha!" "Oink-ha!"
My little board book Moo-Ha! is filled with silly things that I thought would make a cow laugh: "moosepapers," "moosic," "amoosement parks," even "mooseums" where I get a chance to sneak in a dinosaur. To go along with Moo-Ha!, I created a little companion board book: Oink-Ha!