Early on when we first started playing this game, we tried to get him to hide with one of us. He did not get that concept at all and would immediately run out of his hiding place laughing hysterically once someone started looking for him. Now, he understands that he has to stay put and hide but hasn't quite grasped that he also needs to be quiet.
The other day, I was hiding with Camden in our hall closet (his most favorite place to hide) and Brian was looking for us. B did the usual commentary as he went around the house seeking. The greatest part though, was every time Brian would ask the rhetorical question like, "Is Camden in his room?" Camden would answer out loud from the closet, "Noooo." So the game ended up going like this:
Daddy: Is Camden in his room?
Cam in closet: Noooo
Mommy hiding with Camden: Shhh. You have to be quiet so daddy doesn't hear you.
Daddy: Is Camden in mommy and daddy's room?
Cam in closet: Noooo
Mommy: Shhhhh (with laughter, of course)
Daddy: (now laughing) Is Camden in the kitchen?
Cam in closet: Noooo
Clearly, hiding still needs a bit of work. Love.