Create a highly realistic and casual image of a man between 30 and 40 years old, with slightly graying hair, sitting more distantly on the soft, white sand of a pristine beach. He is dressed casually in a white button-down shirt and brown pants, with his black shoes placed beside him. His bare feet are relaxed, buried slightly in the sand, giving a more laid-back and natural feel. He has a thoughtful, calm expression as he watches his two sons play nearby. The 7-year-old is engrossed in building a detailed sandcastle, while the 9-year-old stands at the edge of the clear blue water, calling out to his father with enthusiasm, encouraging him to join in. The children’s playful energy contrasts with the man's relaxed pose, creating a balanced scene of family fun and tranquility. The setting is a beautiful beach with bright white sand and vibrant turquoise water. The sun shines softly, casting gentle shadows on the sand and reflecting on the water. The overall mood is peaceful and relaxed, capturing a quiet moment of connection between the father and his children, surrounded by the beauty of the beach.