Hartz Play Mouse Toy for Cats with Catnip (Pack of 6) Assorted Colors Pack of 6 Through play, cats exercise their natural instincts to explore and thrive in the world around them. Filling your cat's environment with toys that stimulate all of their natural play needs will help keep them healthy, active and engaged. Give the Hartz Play Mouse a gentle pinch to release the catnip aroma and watch your kitty go wild. Exercise your cat's natural instincts to explore and thrive in the world around them with toys that stimulate all of their natural play needs