OK, so nobody replied to my question, so i'm assuming you just haven't tried???

Well I did. I went and got some catnip bubbles from Petsmart, very inexpensive . . . Josie flips out every time I get them out. Not sure if she's responding to the catnip though. But she loves watching them fall and getting them with her nose. It's really cute . . . makes her do that chirping noise.

So give bubbles a try . . . your cats will love 'em!!!