Dear Tatkas,
There are a number of reasons for genu varum at this age.
I agree with Physiobob that a picture would be helpful.
Can you tell us anything about the ROM in his knees?
It is important to know what the cause is. He might need medical help or need to be referred to a specialist.
Do you have any idea of the underlying disorder?
Is he having functional problems that you can treat?
What is the reason for him coming to you?
What are the parents asking of you?
Answers to these questions will help you decide whether or not you can be of assistance.
Esther