an untouched sandcastle at the edge of the beach with the incoming tide slowly washing it away

untouched sandcastle edge beach incoming tide slowly wash away shore creation castle sculpture shoreline decay sandstorm collapse unstable sandplay fragile summer salty crumble fragment transient structure water children disappear flood drift erosion tumble splinter dissolve vanish scenic transcience sunset swash unsteady perish memory ruin submerge damp shorebreak sundown sandy design