I stumbled on this website today.This sure is a jump from when I was a kid. We used to wait on the only news channel we could pick up with the antenna to show the "radar" on Christmas Eve.From noradsanta.org:

For more than 50 years, NORAD and its predecessor, the Continental Air Defense Command (CONAD) have tracked Santa’s flight.

The site is full of games, information and fun stats. You can even get the app!