When children speak, they are sometimes difficult to understand. That is because they have not acquired all of their sounds yet. However, there are some children who are even more difficult to understand due to an articulation or phonological disorder. Children with these disorders may leave sounds out, substitute one sound for another, add or even change a sound. Speech Language Pathologists work with children who have articulation disorders and teach them how to produce their sounds the correct way, resulting in clearer articulation and speech.