A couple of mine love them, one of them gets one end in her mouth and then tries and looks like she's trying to figure out how she can get the other end in reach, it's so comical to watch.

I have an old old rod/string toy that was RB Rocky's it's got this old old striped terrycloth mouse on it, they are all fascinated with it, so I took a straw and tied that half way down the string.

lol

It's extremely popular here.