I am pretty sure that our cats think that everything is a toy!
One cat likes my husband's hairy legs and beard.
Two of the cats think that the storage bins that are covered in cloth are not only the best hiding places, but the most fantastic scratching posts
Foil wrappers crinkled into balls and tossed for fetch are a big hit.
And an actual toy that all 3 use? My 10 year old picked out a toy that is a large plastic disc with a ball that runs along the side and a cat scratching pad in the middle. Best toy purchase ever

(And she is mighty proud that she picked it out and not her parents.)