I love this one because in the upper left photo Bill is laying on his tummy with his toes in the sand.
Bill and Joe built the sandcastle for me. They wanted to do a practice buiding first (Joe even outlined all the bricks on the building).
They knew the waves would take this one when the tide came in that evening but they wanted to make a castle complex for me the next day. Howerver they just never got back into sand castle building mode again.