The mail-order Purveyor of Cat Goop, in addition to rubberized sailor hats, has included some other free items in the order.
This sphere is interesting. It is very nearly red and green. And it jingles!
And this one makes a fine, annoying crinkly noise.
I doubt very seriously that the superannuated feline will bestir herself to play with either of these, but the hard plastic jingly one can profitably be left where the human female will step on it barefoot, and the crinkly one can easily be slipped into her pillow case…