Exercise and fun: With a rustling bell, it is easy to attract the cat’s attention. Encourage instinctual behavior and exercise to keep your cat healthy and alert. Use with any interchangeable cat toy with hook connectors Improve relationships: With these worm toys you can interact with your cat. Have a good time for you and your cat. High Quality: All toys are made of plush material, which is flexible in rotation, strong in tension and elasticity, does not fade or fall off, soft, and endless fun with your cat. It’s safe for cats, but that doesn’t mean it can be swallowed. Great value for money: we have 6 replacement cat refills (6 colors: green, blue, purple , pink, yellow and orange). Cats will never tire of chasing the same old feathers or even the same worms again. Size: 22 cm in total length.