Ok ok, anyone with a cat gotta get you one of these things. If not from that guy, from someone. All I have to do is jingle the chain just a bit and they'll come running from the other room. Teddy will chase it till he passes out. They'll run into each other, crash against walls, spin until they fall over, and otherwise generally suffer level-4 and -5 losses of dignity (future essay) to get the goddamned shiny red mouse

Plus it keeps the PMS'ing wife busy for hours. This alone is easily worth the price of admission.