Know the Signs • Speech Sound Disorders • It is normal for young children learning language skills to have some trouble saying words the right is part of the learning process. Their speech skills develop over time. They master certain sounds and words at each age. By age 8, most children have learned to master all sounds. However, some children have speech sound disorders. This means that they have trouble saying certain sounds past the expected age. This can make it difficult to understand what a child is traying to say. Speech sound problems include articulation disorder and phonological progress disorder.