It Looked Like Spilt Milk is an American children's picture book, written and illustrated by Charles Green Shaw. Originally published in 1947, the illustrations are a series of changing white shapes against a blue background. The reader is asked to guess what the shape is or whether it is just "spilt milk". First the shape looked like spilt milk, then a rabbit, a bird, a pig, a sheep, a birthday cake, a tree, an ice cream cone, a flower, an angel, a squirrel, a mitten, and finally a great horned owl. But it wasn't any of those 13 things. The silhouette shape makes the reader know it is a secret item until the last page. At the end of the book, the last page repeats the phrase as the first page's line. It wasn't really spilt milk but only a cloud in the sky. Then the silhouette shape becomes a real cloud in the daytime sky revealing that it was just a cloud. Then the changing white silhouette turns into a real cloud and the cloud goes up into the blue sky. The last page becomes the blue sky and the white silhouette shape which turned into a cloud. On the last page, the silhouette shape is now a real item. That is, a cloud. Then the book ends.