It all started in our house with a little green rubber lizard. Daddy Y stuck it on top of a picture frame one day to see how long it would take before the kids noticed. It took a couple of days, but the kids found it and then he moved it. Somehow the lizard found his way into the passenger side visor on our van one day. That was great fun for a long time as Awesome NEVER remembered it was there and would startle herself when it fell in her lap on the way to school, almost every day. Eventually the lizard disappeared altogether.
One day, Daddy Y spotted an army man on the floor and found him to be a suitable substitute. He stuck him in the chandelier over the dining room table. Again, it took the kids a couple of days to notice, but they LOVED that and each decided to hide one as well. Needless to say, at this very moment there are probably no less than 4 snipers hiding in my house, with a daily, nonchalant search for their whereabouts. This game has been going on for MONTHS. Too funny!