The JW® Pet Cataction® Spring String Cat Toy is a bouncing action toy that will stimulate your cat's feline instincts to pounce & play. This unique design allows the Spring String to attach to any style of the doorknob, transforming your door into a fun, interactive toy in seconds! A furry, feathered mouse dangles irresistibly on a bungee cord from the doorknob attachment at the perfect height to entice curious cats. Provide hours of interactive playtime with your feline friend & helps to keep your cat occupied & prevent bad habits like destroying furniture. Great for helping your cat channel their natural hunting & pouncing instincts. Attaches to any door knob Great for solo play Exercises your cats body & mind Encourages your cats natural instinct to pounce & swat