Letter D Coloring Worksheets to associate with common objects starting with Letter D e.g. Doctor, Dinosaur, and a Drop. An early fun-filled reading, writing, and activity worksheet to help preschoolers learn the letter D formation and recognize uppercase and lowercase letters. Letter recognition is an important preschool activity and helps children with several activities. Coloring is an excellent medium to improve a child's concentration and enhance fine motor skills. Coloring also improves visual development skills and helps children express themselves in beautiful ways. Let's learn Letter D.