Very important

Andrew: "Mommy, this is very important."

Mommy: "What is very important?"

Andrew: "If we get locked out of our house, Santa can come down from the Norf Pole and unlock our door for us."

Mommy: "Yes?"

Andrew: "Yes, he can use his Santa key. That's the key only he can use. His Santa key won't even work if YOU try to use it, Mommy."

Mommy: "Maybe we better hide a key for Mommy."

Andrew annoyed: "Mommy, you aren't wistening to me! Santa can come DOWN from the NORF POLE and UNLOCK the door for US!"

Mommy: "Ah, yes. Right." Note to self: hide key outside, BEFORE Andrew locks us out to test his theory.

PS Andrew believes the North Pole is actually called Norf Pole, that is not a mispronunciation.