dog mental toy,pet mental toy,pet intelligent toy product size: 26cm*26cm*4cm how to use: 1.put the snacks in the cavities,slid the lids to hide them 2.teach your dog to move the lids by paws or noise, to find food 3.for the first time,you'd better to demonstrate,your dog watches and learns,till it knows how to play packing:in color box