I personally have never seen a watch with an MP3 player that is more than a gimmick. The size of these things combined with poor battery life just don't make them a viable solution. I have seen USB memory watches that are simply for storing data, but all in all I think money would be better spent on a nice real watch and a USB memory stick.
Other devices that might fit his fancy would be a cellphone that has an SD memory card slot for storing and playing tunes, or a simple ipod(or the like).
maybe you are right, i'm idiotic about the electronic products
i got a newsletter from a company, they carry MP3 USB watch, i'm not sure whether it's true or not, but maybe i will follow your advise, a cellphone? Good idea.