My older son is PG, and I never really thought my younger son was highly gifted---though he clearly has *incredible* spatial abilities. There's no doubt that he's a visual-spatial learner. The problem is, I am starting to think that perhaps he can't learn through more traditional auditory methods. At what point does an extreme preference in learning style cross the line into being a learning problem? He's only 4, and we homeschool. What are some red flags for learning disability or 2e that I can be watching for?