What is your cat's favorite toy?

Vinyl flooring! That's a first! He sounds like quite a character. When I find a dead mouse I theorise it died of a heart attack from being played with by a cat. I don't think they know how to kill them! One time, I think Lilly accidently caught one in a vein with a fang, because the next morning I found blood all over the bath tub, along with a good size dead mouse. At least her habit of taking her "toys" in the bath tub made clean-up easier.