A lot of people think that cats suck.
I'd like to clear that up right now and point out that cats don't necessarily suck. You, on the other hand, do.
Cats are just misguided, arrogant, and evil. They kill babies, sometimes on accident, and snub people because that's their nature. Much like dominating lower species and oral sex is human nature. You'll never see a zeebra harvesting whales for blubber, and you'll never see squirrels committing deviant sex acts. Unless, of course, a human is shoving a squirrel up something else's ass. But I digress.
If you want to try to have fun with a cat, you have to be creative. You have to appeal to the cat's evil nature, and it's curious nature at the same time. I took a photo(shop) of a playtime I devised with the kitten that the family down the street owns.

In closing, if you want to have fun with your cat, you have to get up off your lazy cat loving ass and get it motivated. If "motivated" means put a gun to its head and yell at it, then play "tag" for a while, it's your job to do it.