But Not NUTS About Them, But I Have Other Toys On The Way....Nice assortment of types and sizes. My dog loves these.My cats wouldn’t play with the two large balls.Great fun for my kitten. He chase them for hours. Just toss them around and watch your cat go nuts for them.My kitty is enjoying the various size of the balls. The product is a good value.Cats only sort of like the small and medium ball. The largest two balls scare them. On the plus side my boxer mix likes the two large balls. He’ll probably break them soon but for now he seems to enjoy hearing them jingle.So, I constantly buy items hoping to engage my cat. Sometimes it works. He likes the little balls but has ignored the big ones. They are sturdy balls but I threw a little one and it cracked. I don’t see the big ones ever breaking.I liked that it comes in a pack of four so that you can be assured that one of the balls fit your dog perfectly in his mouth! My dog liked the blue ball with the stars the best.