handdrawn cartoon river landscape, blue water flowing through green fields. whimsical style

handdrawn cartoon river landscape blue water flowing green fields whimsical illustration trees reeds path bright colors nature scene artwork children drawing environment natural artistic outdoors scenery countryside stream curving vegetation clouds land flora greenery peaceful playful creative design rural simple stylized charming cheerful ecology graphical decorative vector meadow bushes serene tranquil vibrant foliage curvy fantasy imaginary handcrafted storybook hand drawn through style depicting designed sky