Children can have fun tracking Santa on Christmas Eve at NORAD Tracks Santa and Google Earth. You will be able to see where Santa is through out the night and calculate when he will be close to your home. Use this opportunity for your child to explore time zones (How many time zones are there? Which time zone do you live in? How many time zones away is Santa right now?), geography (Which continent is Santa at right now? Can you find the country he is flying over on a map?), and time (How many hours do we have until Santa is close to our home?).
The NORAD site has a countdown clock with the days, hours, minutes, and seconds until the tracking begins. It also has games children can play in the CountdownVillage.