During the Xmas/New Year's break children have been playing in and the rocks of the wilder beaches that are unsafe for swimming. When walking with the standard poodles in the morning I came across some of the little constructions from found objects in the sand or amongst the rocks.
An example:
Mostly the constructions are circles, triangles or squares made from bits of broken white cuttlefish shells. 0515 was more adventurous and it required a lot more scouting around to find the wood and the iron. The wood had disappeared by the next day.