an image in a detailed line drawing style which is perfect for coloring, showing a playful scene at the beach where a turtle with comic-style cute features is busily building an impressive sand castle.

In this whimsical line drawing, a cheerful turtle adorned with an oversized sun hat diligently sculpts a grand sand castle, its determined expression radiating joy as it expertly wields a tiny shovel. Behind the bustling turtle, gentle waves kiss the sandy beach, while the setting sun paints the sky with hues of orange and pink, creating a magical backdrop for this coastal escapade.