This is a very fun magic trick! Tell the children how you got there and why you use reindeer (who have a very good sense of direction, by the way) for the big ride on Christmas eve! I am not sure that Santa would ever be able to make any deliveries without them!!
This is hilarious!! You will have a lot of fun with this very simple but entertaining routine.
The first video is promotional, the second one teaches the trick once you have it.