I've compiled a list of some great, *free* online resources on the theme of Australia.
1. There are some lovely teaching resources on the official Australia Day Website.
2. Early Learning HQ has some nice free Australia printables!
3. Free printable Boomerang Decorating Template from TES.
4. Free Australia Powerpoint from TES
5. Free Aussie History Timeline from TES
6. Printable B&W Australia Map & Flag from TES
7. Free Australia Day Quiz from TPT
8. Free Australian Symbols Flip Book from TPT
9. Free Aboriginal Art Colouring Pages from Brisbane Kids
10. There are some fantastic Australian poems for children online. You'll find loads on The Australian Poetry Library .
11. The Australia Song from Kids Learning Tube has lots of information about the Australian states squeezed into a fun 3.28min song!
Arts & Crafts:
Aboriginal Dot Painting is a lovely art activity - takes focus and concentration but very effective. I love this idea of creating it on stones!

Image source: Pinterest
These newspaper and felt Koalas are so effective!

Image source: Pinterest
Get out the pastels or wax crayons with some black sugar paper to create some Aboriginal style snake art.

Image source: Pinterest
Happy teaching!
If you're on Mash, my Australia Resource Pack for 4th-6th class is available to download!