SPEECH SOUND DEVELOPMENT - Why do you need Speech Therapist for Speech Delay?
Children learn to use sounds in a predictable pattern. They do not all learn at exactly the same rate. There are age ranges in which sounds are learned. To see these ranges click here.
The following are errors commonly made by children at a given age. These errors are normal. If your child demonstrates one of these errors, there isn't great reason for concern. If they tend to produce many errors, you may wish to have their speech assessed by a speech therapist. For example, a 5 1/2 year old who has trouble with both "s" and "r" should probably be assessed.