Australian History
Australian History begins with the study of those who first arrived on this continent, not the immigration of Europeans. It is the story of the Aboriginals and the people from all over the world who have settled here.
General History
History Timeline: An excellent way to make this point is to take a long role of adding machine paper and put the dates from, say 20,000 BC (or whenever humans arrived on earth according to the most recent archaeological findings) to the present.
Then make little cards with pictures and dates to show the relationship of events in time. Some suggestions are "crossing the Bering Straits," "Height of Aztec civilization" (and as many other Native American events as you and the children can find) "Columbus arrives", "TV was invented" and so forth. Laying the cards gives an impression or overview of history. Use timelines for any subject.