- Includes two sisal mice, each with a compressed silver vine & catnip nose.- Contains a natural, yet potent combination of silver vine and catnip attractants to grab and hold your cat’s attention for enhanced playtime-Silver Vine is a vine that grows in the high mountainous regions of eastern Asia. It produces a natural and effective cat attractant, that stimulates livelier play in more cats when compared to catnip alone-Exercise your cat's natural instincts to explore and thrive in the world around them with toys that stimulate all of their natural play needsNon-toxic, natural and safe for cats of all ages.