Why does the elf on the shelf leave on Christmas Eve?

Leaving Cookies for Santa

Because they think they'll get more toys that way! It works, too, but don't forget the carrot for Rudolph.

Okay! Its self explanitory!!! A jolly fat man goes all around the world to give gifts..#1 , its only fair he at least gets some cookies and a glass of freakin' milk!! #2 , He'll get hungry! I know i would sure as heck be hungry if i gotta give a bunch a presents to kids all over the world!!!! Think of it that way >:)