We use this for our kittens and adult cats. The kittens loves it from the beginning, couldn't keep them off it.  They learned to use the scratching poles easily. The only thing that was a hazard was the play balls hanging from the different levels.  One of the kittens fell off the top level and got his tail tangled in the cord and the cord did not break or tear from the level it was sucured too.  He is fine but of course was very scared, we took the other ball dowm and would advise giving others who purchase one of these products to be awear of a possible danger.