As far as the IQ assessment goes, I was there for his whole evaluation, they asked him a few things like big and small and had him do some color matching and a ring stacker.
If I remember correctly, children usually understand big and small, stack rings in order based on size, and match primary colors by around two and a half to three. That part of the assessment sounds like it was just to see if he was hitting cognitive milestones on time and I don't think these milestones have ever been shown to predict IQ.
