Not bothered or burnt

Sidney Jade was about five. As a family we had gone to the beach in California. It was summer time and a nice day, we had fun, but it was time to go. We were walking across a large sand dune, toward our cars. We got about half way across when we realized this was Really HOT sand. It was not just warm, we were burning our feet! Chance, Drex and Tara began to run to the grassy patch a few yards ahead. We jumped onto the grass and could almost hear the sizzle of our feet on the moist, plump, green grass. We looked around to see where Sidney Jade was. She was still walking across the sand at a leisurely pace, not bothered or burnt by the scorching sand. How did she do that?