"Start off small with a crinkle ball. Toss it around, crunch it in your free hand, and wave it in front of your cat so that their eyes lock onto it. Continue to shake it around, ensuring that their focus is dialed in carefully on your hand. Now for the "trick" part—while continuing to crunch the ball, place it behind the camera, which is being held by your other hand, ready to fire. As soon as you put the ball behind your camera, you'll notice that your cat continues to look for the toy and follow its sound. They will gaze directly at your device. Now's your chance. Snap the photo!
Rinse/repeat as many times as it takes to get the shot. Much easier than you thought it would be, right? If they're not following it behind the device, you can also place the toy on top of it, as opposed to behind it. You'll get a very similar effect."
Image Source: Andrew Marttila