Hi Andy and welcome here,
While we have these terms Verbal and Non-Verbal.
We actually have 3 different thinking processes.
Auditory, Visual and Spatial.
So that the Verbal IQ test, shows that he has exceptional auditory thinking.
Then if we come to Performance IQ, which is a test of Non Verbal thinking.
It is combined test of Visual and Spatial thinking?
But the problem with a combined test, is that it doesn't clarify whether it is a Visual or Spatial difficulty, or both?
Yet most often it is a Spatial difficulty, rather than Visual.
Where it is important to understand what he actually has a difficulty with?
A crucial role that Spatial thinking does, is as the organizer and ordering of our thinking. So that we can think through a process, and recall a series of directions.
Spatial thinking is also how we concieve of numbers, where it gives numbers a quantity.
So perhaps you could talk a bit about what sort of difficulties your son actually has? Where given that he is 5 years old. My recommendation would be to become a bit of an expert on your son's difficulty.
So that you will be able to identify what would be helpful for him, and avoid trying out things that aren't helpful?