Santa's elves

Last night, Ben & Maggie were having a conversation about Santa.  Maggie asked him how Santa knows what you have been doing and Ben told her that his elves are watching all the time.  He said "Maggie, the elves are everywhere, there are trillions of them watching you RIGHT NOW.  There are 7 of them this close to your face".  Her eyes were wide and you could see her thinking "WHAT????!!!"  I told her not to worry and not listen to Ben, that was just a story.....