Theres the things like a mp3 player but you punch in the button for each station and it tells you about that station, which im sure if he has heared of which hes not looking for... thats why he gave the ridiculous task.
There is going to have to be some advertising or else it would be kinda pointless to do any of that because no one would know...
I don't know if anyone has thought of this but im sure if its the peoples mp3 player and the museum put the info on there for them, there would have to be some sort of signing an agreement because if any data on the mp3 player got lost there could be someone sueing the museum...
What I would suggest is for the people to do it from the web at home which if needed to charge them for it then you can make them pay and the link would be sent via email or on the web site.
I have a pretty good idear but it would take me too long to explain it... if you want to know just pm me or my aim is handheldsquirl