"My two cats (a 1 1/2 year old and a 8 month old) love this toy. The older one is big, but he loves to play with it. There are a few things you should know before you buy this however. One, the Petco.com measurments are wrong. If it were 9.5 inches in diameter, you wouldn't be able to give this to your cats cause they could probably swallow it. It is actually about 28 inches in diameter. 9.5 inches is presumably the inner circle. Two, it is kind of flimsy, but I don't know if Petmate intended for it to be that way. It's flimsy in the sense that you can fold up the sides and take the ball out and put it back in. The cats can't do this, but you can. I kind of like that because sometimes the cats like it when I put the little balls with the bells inside. Three, it's not weighed down, so it moves when my cats play with it. Not a lot, because I have carpeting, but if you have a lot of floors this may not be the case. Overall the cats really do like the toy, and I like that they like it so much for such a little price."