Lancelin
We often head up to Lancelin, a small fishing town 1.5hrs north of Perth for some fun in the dunes with the Sidewinder and a bit of Windsurfing. this is also where we ran SU Windsurfing Camp for several years.
The Dunes are great for getting a bit of air - in this case in my Terrano II 4WD.
Sandboarding
Bonnet-Sledding
Snorkelling