Make play fantastic with the 3 ball toys. The cat toys make lifelike animal chirping sounds once playtime begins, beckoning every bat, bite, chew, and chase! The 3 animal sounds are frog, cricket and bird chirping respectively. The balls keep quiet when left alone to save battery power. Pets are famously cute AND messy. Luckily, the 3 cat toy balls are made from durable and highly resilient EVA materials which endure each aggressive wrestle; Plus, EVA materials are soft and safe for cats. And the built-in batteries make each cat toy ball last 10,000 times of chirping.