The simple but adorable and funny illustrations wonderfully compliment the story's spare text. And it makes since, wombats don't do much but sleep, eat, and scratch.
Occasionally they'll take a dust bath (kids loved that) or battle a welcome mat (sorry, 'flat, hairy creature").
Now, that dustbath takes place in front a family barbecuing outside and they look shocked. My students decided that they must have just moved in if they've never noticed the wombat before. It's large and persistent, seems like it would be something hard to miss. Shortly after the dustbath she discovers the welcome mat: