It literally has a hole right the way through the middle of the book and it allows you to be as creative as you wish with the empty space.
This book is just begging to be picked up and played with. It invites the reader to try a whole range of activities to fill the wide open space.
As always, we had much fun with this offering from Tullet. His books always insight another level of creativity and a slightly different thought process for children, pushing the boundaries as to what books can really offer a child (and a slightly bigger child for that matter).