Santa's Magic Key

Don't have a chimney, how will Santa Claus get in? The problem is quite clear, you can use a Magical Santa Key! 

On Christmas Eve place a key on the outside of any door. While everyone sleeps tight, Santa will make his way to your home. Using his magic dust on the key, he will unlock the door and make his way in. He will stuff the stockings full and leave the presents under the tree. When Santa is finished he will place the magic key back on the door, so it can be used again next year.