what might be wrong with the child

find that his intelligence appears to be average for a 4-year-old and so, there no concerns about his cognitive skills. Still unsure about his delayed speech development and lack of appropriate social skills, you make some recommendations to the parents.

[specialmom]

Google sensory integration disorder.  Speech is often affected with a sensory kid due to motor planning issues.  Social skills are almost always an issue with a sensory kid.

Also, just a plain speech delay can result in social issues with peers as that lack of communication can hinder usual play.

Look up sensory integration disorder and if it fits, I have many suggestions for you.  But certainly, a speech evaluation should be recommended.  If it is a first born child, parents might not be aware that speech is behind other kids of the same age.  good luck