Depart from Perth in the morning and head north to Yanchep National Park, about a 45 minute drive outside the city.
Look for koalas, wild kangaroos, and the park's abundant bird life as you take in the scenery. Then continue another hour by road to reach Cervantes. Tour the lobster processing factory known as the Lobster Shack (closed between October 1 and December 7), and walk directly above rows of live rock lobsters. An audio guide is offered in many languages. Afterward, have lunch in Cervantes.
Next, a short drive brings you to Nambung National Park. Stop at the visitor center to learn about this large natural preserve, then take a walk around the Pinnacles. Your final stop is the town of Lancelin, which boasts extensive sand dunes nearby. Using the provided gear, you can try sandboarding, which is similar to snowboarding on sand.
Return to Perth in the evening at the end of your full-day tour.