Stuttering interferes with a person's ability to speak fluently. It involves the repetition; prolongation; or blockage of sounds, syllables, or words. When a child stutters, he may hesitate to raise his hand in class, read aloud, or talk with other children in the class. Stuttering usually begins between the ages of two and four. While there is no known cause, researchers agree that stuttering likely results from an interaction of factors including child development, family dynamics, genetics, and neurophysiology. This article offers advice and strategies that are helpful to the child who stutters.