The Continent Song
This fun, interactive activity is a great tool to acquaint you child to the world. Simply make cut-outs of each continent and cut or print out pictures of things that represent each continent. There are many great sites where you can get printable templates of the continents.
You can take the fun a step further and learn about the animals predominantly found in each continent.
Next, you could track population, languages spoken, weather, natural resources, exports, etc..