Cat toys are made for people to buy something for the cats - the cats, in general, seem to prefer the bag it comes home in, the box it came out of ... etc. etc. My old coworker JD used to every week save paper bags from their grocery shopping, and set them up empt around the kitchen, and their black kitty Salem would have a blast hopping in and out, knocking them over, hiding in them, etc.

"Found toys" like a human's ponytail holder, figurine, something shining left on a shelf also seems to hold a huge attraction.