Somehow, my eyes just sort of do the magic eye thing naturally. Like it's never taken me any effort, I just have to move my eyes a certain way, like I was focusing on something, and they appear.
I got it eventually. I tend to put my nose right up to the screen to uncross my eyes enough, and slowly pull it away until it comes into focus, but the right one is harder because it's supposed to be closer, and therefore bigger.
Cross eye is easier for me, but these are never cross eyed.
I'm unable to cross my eyes, so that may have something to do with it. They sort of go the opposite direction instead of crossing if I let them drift to see the magic eye picture.