The Cataction Spring String Cat Toy is a bouncing action toy that will stimulate your cats feline instincts to pounce and 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 and helps to keep your cat occupied and prevent bad habits like destroying furniture. Great for helping your cat channel their natural hunting and pouncing instincts. Made from non toxic durable materials. Great for solo play Attaches to any door knob Exercises your cats body and mind Encourages your cats natural instinct to pounce and swat