I have a nephew like that - his old brother is very bright but he is a 'hider'. He can put complex puzzles/mechanical toys together with dexterity but insists that he is never going to learn to read. His parents really dote on the older brother who is bright enough to enter the NYC G&T program but tend to see him as slow. I think that some of it comes down to personality - the older nephew loves to show everyone how clever he his whereas the younger one shrinks from it.

Become what you are