first programming language

[roberto <roberto03@gmail.com>]

hello
one of the young guys (13 y.o.) i am teaching to as far as regards
math and physics repeatedly asks me to introduce him to the world of
programming (and linux in particular) whose he is very fond of ...

i'd like to ask you which programming language you think it is more
advisable in this situation

if the question is too general, please ask me more details

i will use the situation also to inntroduce him to the debian world as well :)

thank you very much

-- 
roberto
OS: GNU/Linux, Debian