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. With the BUSTER Activity Mat you can give your dog new challenges over and over again and vary the level of difficulty. The Mouse Trap is a task with 3 pockets. The smaller pockets with a ‘tail' can be inserted into the bigger pockets from both ends. Your dog has to remove them individually to find the treats. 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 you're ready for more fun. With the BUSTER Activity Mat you can give your dog new challenges over and over again and vary the level of difficulty.