My cats received these as a gift. They love them. Will be ordering more.

I received this as gift. The instructions s said the ball covers were for when not in use. So, I placed both covers on. Now, they won't come off!!!! They appear to be permanent, as they snapped on, but won't snap off. False advertisement in my opinion!!!! Since I never got to get my cat use it, I say, "Don't buy this product!!!!!"

My cats were interested in this when I first put it on the wall. Once they satisfied their curiosity they were done with it. But, in my opinion, it does make a good decoration.