Child #1 could spend all day digging in the sand. Filling and dumping and refilling buckets. Making hills and mountains and castles of sand. But she doesn't care as much for the ocean. She got knocked over by a wave on our first visit, and I made her go back in for the second visit so she had some fun experience in the water and didn't think you could come to the ocean without at least dipping a toe in.
Child #2 loves the ocean. She would have run straight into it till she was carried away by a wave if we had let her. Born in water, she's been my water baby ever since. She was happiest waiting for the next wave to wash over her. She didn't like the sand much because she didn't want to get dirty. She kept trying to wipe off my toes buried in the sand. She eventually did dig in the sand. But before long she wanted to splash in the shallow waves of the ocean.