Coloring Page: Penny's Puzzle Challenge

Black-and-white line art for a children's coloring book. A young girl named Penny, around 6 years old, with curly bobbed hair and round glasses, wearing overalls with puzzle patches and sneakers. She is clever, thoughtful, and curious. The style is imaginative and whimsical, with bold outlines and a pure white background. Include a thin-outline title at the top that says: “Color Code Challenge” so children can color it. Scene: Penny paints puzzle blocks with the right colors to open a glowing rainbow door.