What is your cat's favorite toy?

One of my cats actually killed a mouse about a year ago. I didn't even know we had a mouse. He is the predator of the house though. He finds any escaped crickets

our tonkinese has a favorite toy type, strips of vinyl flooring. He is actually the type that likes any small floppy things, like the milk bottle rings Karen was talking about above. But he loves thin strips of vinyl flooring. He actually comes and waits if he sees one of us cutting it. And he puts everything in the water bowl. Or my shoes. Sometimes both, in the water bowl, then out, then in my shoes, wet. He is a very odd cat.