By Nina Ottosson, the Dog Brick interactive puzzle (Level 2: Intermediate) will stimulate your dog's brain and have a blast at the same time! This unique toy is a tricky and activating game for you and your dog. Hide treats in the nook under the sliding discs, and let your dog look for the goodies by trying to pull the discs to the side with his paw or nose. Increase the degree of difficulty by placing the white plastic blocks in the nooks in the middle of the DogBrick. Your pup will love the reward for a job well done, and you'll love watching him put on that doggy thinking cap!