how to help 7-y-o with no corpus collosum

How do you help a 7 year old who has no corpus collosum connecting his right and left brain? He has not had the Doman stimulation so far, though he has had a lot of other input and can walk and talk to some degree, which was not expected. How can his brain be stimulated to connect the 2 hemispheres now? Is it impossible? Are the the 2 hemispheres to be treated as separate entities and stimulated separately? Would right brain training work now?

I would contact Wennie or Pamela from RBK. I’m sure they would be able to help. They have probably come across something similar.