【Size】5mm in diameter, with 3 different color balls: yellow, blue and pink 【Material】Made of high quality EVA silicone, which makes it scratch resistant, sturdy and durable, and safe and non-toxic. 【Creative Design】When your cat touches or hits the ball, the ball will emit animal sounds to attract the cat’s attention. Pink is birdsong, blue is frogsong, and yellow is cricketsong. 【Keep Your Cat Healthy】The rolling and calling of this ball will interest your cat, will stimulate hunting instinct, help your cat exercise more, improve immunity, reduce obesity and help your cat have fun at the same time. Can stay healthy. 【Improve the relationship】 Whether you’re a kitten or an old cat, our toys provide a fun way to exercise. Interactive toys can increase the interaction between you and the cat. It will also bring you more happiness and relaxation. Build trust and friendship between you and your cat.