Welcome to HCM.
I think your son is doing fine and lucky that it was only meningocele and not myelomeningocele
which could have caused more severe problems.
Best place to consult is the hospital where he had the surgeries. Because his shunt needs to be checked regularly.
Since you are in Bangalore, you have our national Institute NIMHANS, nearby and in any case of complications, that would be the ideal place to go.
Wishing your child a very healthy future.