I love the National Geographic website. It has lots to offer parents, teachers and kids, including amazing images and stacks of fascinating facts. One cool feature I discovered recently via freetech4teachers is the Atlas Puzzles.
These are online jigsaw puzzles based on different maps. You click a map to choose it, then click again to break it into pieces. Then you drag and drop the pieces to reassemble the map. If you hit the options tab, it allows you to change the difficulty level by altering the size of the pieces and enabling random rotation. The site times you so you get to try to beat your own time.
I think this is a fun way for kids to get to know the map of a country or continent they're studying. There are 23 maps altogether, including Australia. It's also a way to engage kids who love maps in a little spatial problem solving.
If you're looking for other places to try a digital jigsaw, you might be interested in my article, Jigsaw Planet.