You need to do some basic research.
Too lazy; didn't research. In Australia, 4×4 beaches are recognised as roads. All road rules apply, speed limits are signed. You even have to deal with planes when driving through an airport. Yep, beaches also have designated airports with regular traffic and they function exactly the same too.
99% of the east coast to go to, but if the idea of your toddler being unsupervised in road and air traffic sounds fun to you, there's maps. And you'll see all the warning signage that'll let you know you're at the right spot. Plus all the traffic. If you really want to step up the fun, walk past the 40kph road signs to the 80kph ones. Orange beacons mean you're on an airsyrip, great sunbathing spot. It's your right.
You picking 25,700km of east AU coastline to roll out your towel and let the kiddos run around...
