That's pretty cool!
I have mine "wait" and I go hide somewhere else in the house (nothing real hard, behind a door type thing) and then I call "Find it, Dad" and they come searching. They get a treat when they "find" me.
They both really enjoy this game, and when I get tired of them bugging me "Find it, Mom" sends them scrambling to annoy my wife (she doesn't think it's as funny as I do
).