It’s a Little Book by Lane Smith

From chapters.ca:
Now in diapers! For the youngest of readers who still prefer to chew on a book rather than read it, It's a Little Book asks what a book is for - Is it for chewing? Is it for wearing? - and answers the question in a warm and charming way. As funny and captivating as the bestselling It's a Book, It's a Little Book promises to delight a new generation of readers.