When Aaliyah and Keefer Wilson's father built them a mega skateboard ramp in their south Gippsland backyard in Victoria, it should have been a hint at just how good they were at the sport. At 8-metres tall and 90-metres long, it's the biggest in the southern hemisphere, and has played its part in their success. The teen siblings are now travelling the world as they vie for a spot in the Australian skateboarding team at the Paris Olympics.