With OOLYs Our Day Coloring Book, the art of coloring has been transformed into a fun learning experience! This 18-page tactile coloring book boasts smart educational features like a raised black line to help guide your kiddo as they color, as well as a full-color guided workbook next to each page. Features 18 different illustrations Each illustration is outlined with a raised black line Use with OOLY markers, crayons, colored pencils, or your own coloring supplies Includes a full color guided workbook next to the coloring page 7.9 x 7.9 coloring book Suitable for ages 3 and up