I can honestly say TI calculator programming was my first foray into programming as well (I'm 25 now). I remember meticulously typing in a BASIC clone of Pac-man and having it not work the first few times I typed it in (I think it would take me nearly an hour each try). I didn't really program much after I stopped using TI calculators a lot until someone showed me tryruby.org and I found it interesting. Now, two years later, I work full-time as a programmer and have decided this will be my career. Funny how those little side diversions when you were but a kid can come back in a big way.