Kruuse Task for Buster Activity Mat, Book This is a level 3 challenge to be used in conjunction with the BUSTER Activity Mat (sold separately). This means you can use it in 3 different ways to make the task more challenging Have fun together with your dog and stimulate your dog mentally. Give your dog more content in everyday life with the BUSTER Activity Mat The Book is a task that is sewn to resemble a book, with pockets on each page. The task is attached to the mat by means of 3 press studs on the back of the book. Increase the number of pages containing treats for a bigger challenge The BUSTER Activity Mat is designed in Denmark by Marianne Haller Vesterholt to play and interact with her miniature schnauzer Ludwig when he got too smart for traditional toys. It is also recommended by dog psychologist Anders Hallgren This task is made from a durable nylon which is easily cleaned with warm soapy water. Do not tumble dry. Just hang it up to air dry and youre ready for more fun