That's superb Martino.
On the "legally blind" thing, the brain structures of children are often referred to as being very "plastic" in the sense that new connections and pathways form very easily. You're born with all the brain cells you'll ever have, but the connections between them are almost infinitely programmable. It wouldn't surprise me at all if you son's brain was rewiring itself to compensate for whatever injury was caused by the stroke.
You're doing exactly the right thing, imho, by encouraging him to do stuff like this. It'll help retrain his hand-eye coordination, spacial perception, etc, etc.
It also makes you one heck of a dad. Well done.
mystic_1
