Here's a shot of the beach. As the tide is low the inner reef is visable and thus people will venture onto the reef to see the rock pools. There's plenty of fish caught in the rock pools as the tide goes out, as well other sea creatures, like eels and octopus.
The sand isn't the right quality to build sand castles and the like. My father knows the tricks of building some amazing sand scalptures, and has done over the years. I've got some fond memories of him building all sort of things like a shark complete with teeth made of broken shells. Thankfully the outer reef keeps the real sharks out, otherwise I highly doubt people will want to go swimming!