Although the learning curve is a bit steep at first. A Gameboy with LSDJ is quite possibly one of the most powerful tools you can have in a setup. You can get them for under $20 and there are so many possibilities that don't just have to be constrained to chiptune music. I use my Gameboy to create basslines, unique sound effects, and sketch out beats in my free time.
His mother went to the mall one day and bought a GameBoy and 2 games, Tetris and Daedalian Opus. While restoration, mother used super-glue instead of double-sided tape, completely ruining it (but luckily Charlie.EXE owns a GameBoy Advance SP and he has emulators on both of his PCs