Letter O worksheets like these are great for toddlers, preschoolers, and kindergartners. They provide a fun and easy way to practice letter recognition skills for both uppercase and lowercase letters. There are two versions of the Do-A-Dot printables available, one with white backgrounds and one with gray backgrounds. If you don't have Do-A-Dot markers to color these letter O coloring pages, you can always use regular markers, crayons, colored pencils, etc. We hope these dot painting printables provide a fun way to teach letter O concepts to your students!