"Where's Ziva?" (AKA peek-a-boo) is one of the popular games in our home. We play it around walls, behind doors, with blankets, with "Taggie," with books. Ziva will even play with her bib. A little over a month ago she started to start the game herself. Then she gets really excited and plays really fast. Recently she has added playing over her fence. Yes, we fence our child in. If not she would be out the door and down the block with car in less than a minute. Anyway, she sneaks "behind" the fence and then pops out. We just can't figure out if she knows we can see her when she is "hiding" or not.