Coloring books are printed books filled with line drawings that people can fill in with colors using crayons, colored pencils, or markers. They are popular among children but are also enjoyed by adults as a relaxing and creative activity. The images can range from simple shapes to intricate designs, often featuring themes like animals, nature, or mandalas. In addition to being a fun pastime, coloring books can help improve fine motor skills and enhance creativity. Many educators and therapists use them as tools for teaching and relaxation. The rise of digital coloring apps has also made coloring more accessible to a wider audience.