A "game" for the Super Nintendo that came bundled with the SNES mouse. It could be used to play a fly swatting game, draw pictures OR, and this is the fun part, compose music!
Yes! Inside Mario Paint there was a crude midi-editorish program that let the user compose scores with such instruments as pigs grunting, Game Boys bleeping and stars tinkling. Naturally most of the kids playing this game lacked sufficient understanding of harmony to do much with it, but it was fun anyway.
** WARNING -- EXTREME NERDINESS ALERT **
** IF YOU ARE ALERGIC TO GEEK YOU MAY **
** WANT TO LOOK AWAY **
There is apparently a subculture of people on YouTube who compose reenactments of well known tunes in Mario Paint and post videos them (with icons of dogs, mushrooms, super mario heads, etc.) You can listen many genres such as rap, rock, tv show themes, but the most popular by far seems to be tunes from Nintendo games. If the idea of listening to the Air Man theme from Mega Man II as interpreted by Mario Paint appeals to you then, please, fire up YouTube and do a search.
I never thought I'd find people this much nerdier than I am. It's such a happy moment it makes me want to cry.