have you ever dangled a bit of string in front of a cat. if you haven't, you absolutely must try it.
step 1: find cat. if you have a cat, brilliant! find it. if you don't have a cat and your neighbour does, kidnap it.
step 2: find string. yarn works just as well.
step 3: put the two together. dangle the string in front of the cat, or drag it across the floor (string, not cat). keep it out of furry's reach, and keep it moving.
I've always thought cat-toys were designed to humiliate and insult the intelligence of these normally dignified and intelligent (my cat happens to be an exception) animals. that was before i tried the string trick.
watch as they start acting like retarded kittens.
be warned, they can chase the string for hours on end without tiring.