Taunt Your Kitty.
The kitties love this Red Laser Pointer from ThinkGeek.com. It's their second favorite toy - right behind feathers on a stick. The laser pointer uses AAA batteries, not the really expensive small disc batteries that you find in many other laser pointers. The only bad part is that you have to hold the switch down, and that can get a little tiring after a while. Though, I bet that the husband can take care of that by modding the laser pointer with some parts from Home Depot.