http://www.catiqtest.org
Does the cat IQ test measure a cat's intelligence, or does it prove the uselessness of human IQ tests? An enterprising 8th grader has a devised an IQ test for cats based upon the principals of human IQ tests.
The test includes things like seeing if your cat will inspect a lit flashlight placed on the floor; how long it will maintain attention on a computer screen cursor; and a shell-game of sorts.
If you have a cat or two, certainly it's worth your while to find out if its IQ is higher than yours.