Hi gang, first post. I've been lurking for a few days. Anyway, I wanted to let you know that I've created some bare-bones, printer-friendly volcano boards and posted them on my webspace. They can be found at the links below. Cheers!
http://www.simplephrase.com/games/icehouse/eg-volcano-board.pdf
http://www.simplephrase.com/games/icehouse/eg-volcano-board-mega.pdf