There is a great way to help the kids keep track of Santa's path as he travels around the world distributing gifts. This has long been a tradition in our family (as soon as we got internet, back when our kids were very little).
The site is sponsored by NORAD and can be found at Santa Tracker.
Put the site up and let the little ones run by every once in a while for an update.
I hope this becomes a part of your family tradition, too!