I taught myself how to program in TI Machine language because I couldn't afford to buy the 'Basic' add-on cartridge for it. I was 11 or 12?
It was actually pretty cool what you could do with graphics on that thing. I was fascinated with animation back then and would program these elaborate scenes with clouds drifting and birds flying. Cars driving down a road. Stupid things like that, that you do when you're a kid. Now days they call them animated GIF's and you can do it in 15 minutes with photoshop. Back then I programmed it pixel by pixel, line by line, hour by hour.
I wrote a program one time that turned the QWERTY keyboard on it in to a piano keyboard and I could play my TI-99-4a like a synth.
Then I picked up my brothers guitar one night and strummed it, and it's been all down hill ever since. Heh.