At work one day, I was challenged by a statement from a co-worker: "You need to find a way to recycle some of this styrofoam." (We received shipments that needed refrigeration, and they all came in dense styrofoam containers). Being a self proclaimed artist, I thought it would be fun and challenging to be able to reuse said boxes and containers. As chance would have it, I stopped by a Michaels and was guided to the floral section where there was this "Wonder Cutter." (See: http://www.amazon.com/FloraCraft-Styrofoam-Accessories-Styro-Cutter/dp/B000XALM54/ref=sr_1_2?ie=UTF8&qid=1323063429&sr=8-2).
It was a device that was used to cut or slice floral foam, and it did that by heating a wire that could be used in the cutting of the foam. Just what I needed. Please be aware that the device shown on Amazon is the latest version of the tool I used. It is different in the switching, and case. It should be "hackable" though, but check it out first.