The bubles aren't like soap bubbles, in that it takes a lot, hit or miss, if it makes bubbles, a bit frustrating to get it to work consistently, but it's safe for cats, my cats adore the bubbles, they chomp at them (do not add soap to make it work, it's edible), and I love the concept- for what it's worth I may be doing it wrong lol blowing too hard etc... wonderful thing this is...