We heard a cute story today.

Two workers were getting ready for meeting in their room and the door wasn't quite shut, so the little boy (3-4) invited himself in.  When he saw them praying, he knelt down too.  One of the workers looked down at him, and he looked up, and when their eyes met, he put his finger to his lips and said, "Shhh!  If you make noise, I will put you out of the room!"  

We all know where he'd been hearing that!