According to my wife who is a Speech & Language teacher with 'special' pupils, it was invented for 'special' kids because it's the easist font to read.
According to statements from Connare, he never intended the font to be released for general use, and only designed it to be used in comic-book-style speech bubbles within MS Bob.
Verdana for me.
Actually, the designer wanted to imitate the hand drawn style comic book fonts and...
Hence the name.
Comic - Sans Serif.
I quite like the one in Salisbury Cathedral...