In BASIC (the horror) when I was maybe 6 or 7. I tried making text adventure games by writing out every if/then branch explicitly...
I was lucky enough that my grandparents bought me one of those computers that hooked up to my TV, and it had a BASIC interpreter on it. I still have the manual...
I attribute my code reading abilities to navigating my own GOTO spaghetti while trying to recreate ZORK.
Dijkstra says, "It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration." But he complained about nearly everything.