My cat likes to play games on the iPad. Because it's one big touch-screen, he can bat at stuff and make things happen. They have a specific app called "Cat Toy", where little bugs, butterflies, mice, or red dots will move around the screen, and when he whacks it with his paw, they splinter into three and go in all directions, and speed up. He loves this game. He also loves the Yule Log app I downloaded.
Cats are attracted to movement on screens, for sure. This cat will sit on top of the tv, and whack at Cathe and crew's hands as they wave around during a workout. It's pretty funny.
Cheers,