Dunno if I *presently* count as a transhumanist kid, but I read "Great Mambo
Chicken and the Transhuman Condition" at a very early age - I think 10 or 11.
(I even understood it.) Anyway, that was my first real introduction to the
idea of transformational technology in the here-and-now, rather than only in
the science fiction I had already been reading for three or four years.
Moral of the story: It all starts with "Space Cadet".
--
sentience@pobox.com Eliezer S. Yudkowsky
http://pobox.com/~sentience/AI_design.temp.html
http://pobox.com/~sentience/sing_analysis.html
Disclaimer: Unless otherwise specified, I'm not telling you
everything I think I know.