Material ty :The cat ball toy is made of cotton rope,non-toxic to use.It's for your pets to chew and can be applied for a long time..Funny Cat Toys Ball: The single ball is approx 1.97 inches,suitable for your pets to bite and chew,can be used for adult cats and kittens.The cat toys ball is colorful and the attraction sound of crushed stone will make your cat more excited and interested.The rustling sound of the crushed stone is quieter than other bell ball kitten toys, but enough to attract the attention of the cat..Interactive Cat Toy: The colorful cat balls shape immediately captivates the cat's curiosity.It's allow cats to play, chase and stimulate their instincts.It can both engage them do more exercise and relieve the boredom.The kitten toys will reinforce the bond between you and your cat,if you play with your cat using the cat toy ball.. Gift For Your Pets: Cat ball toys choice for pet gift such as Thanksgiving Christmas birthday or other holidays..Easy To Carry: If you take your cat to play outdoors, you can take this cactus cat toy balls with you,they are very small well suited to take out..Notes: This toy cannot be washed or stressed.