It is possible
But would be a mistake to treat the child's pronunciation too seriously and constantly to carp at it.
What to do with the child who in , or in years says so muffledly, what other children cannot understand him and laugh at him?
First of all it is necessary to check his hearing.
It is possible to address to the logopedist.
But it has to be the expert who is able to treat small children and to make lessons interesting.
You will find the logopedist or not, the child has to be as much as possible in society of children, it is desirable the age..