Use a world map (from Google) to explain how Santa will be transporting the gifts all around the world. Bear in mind that children in Australia will wake up earlier then children in the USA due to the different time zones.
Below you can see a map of the 12 different time zones across the world. This map can help you plan the route.
The sun sets in the west, which means New Zealand is the first country to go to bed on 24 December 2014. This is where Santa must begin his trip around the world if he wants to deliver the presents before morning.