line art, black and white, happy Christmas tree on a meadow, front view, detailed face, full head with ears, sketch, coloring page for kids, coloring page for children, thick lines, cartoon, drawing, printable outlined art, crisp lines, No background, clip art, hand drawn, No shadows, drawing, No gray, no shades, high contrast. The line art should be clean and crisp, with uniform thickness and minimal shading, to provide a user - friendly coloring experience.