line art, black and white, christmas tree with a child opening presents, family, decorations, happy scene, cartoon sketch, coloring page for kids, coloring page for children, thick lines, realistic, 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.