My kitties are catnip FREAKS! In fact, they put the Fabulous Furry Freak brothers to shame! So, I assumed they'd love these bubbles once they got a whiff. So, when they didn't quite get it right away, I still kept blowing bubbles (over newspaper and paper bags) for a good 25 minutes. They finally came close enough to inspect (and smell) the bubbles but were completely unimpressed. I guess it was a waste of my money.