I have a cat that was homeless and pregnant when I took her in off the streets. Although she was clearly not feral (she invited herself in) she apparently had been neglected (or, God forbid, abused) enough not to completely trust that I really could love her at first sight, so her full personality didn't come out at first. In fact, she seemed decidedly unfriendly (not mean, just aloof). So one day, when she kept peeking around the door of the closet at me, and then running into it when I looked at her, I just assumed she had taken a fright by something I had done unintentionally. It wasn't until I noticed her "squinting" at me around the door that I realized she was enjoying herself. That's when I realized she was playing peekaboo with me! She gave birth overnight, so it was several weeks later before she got to play again, but I realized she was eager to start when I saw her cute little face peaking out from behind the stove at me one day. Of course, as soon as I looked at her, she dashed back behind it, only to poke out again seconds later. I really got into it, and that made her enjoy it even more. I estimate that she herself was only about 7-8 months old when she gave birth, so she was still a kitten even in motherhood. Alas, she grew up, and is now an old mom of about 2 - 21/2 who successfully raised a batch of three, and she no longer plays peekaboo with me anymore. Now her favorite game is keeping her 17 lb son (she's just under 10 lbs) from usurping her top-cat status.