Hey guys. I'm just finishing up my first two Glorified Sock Puppets, and for my third puppet, I want to use foam to make the head. Being my first foam venture, I don't particularly want to blow the money for Scott Foam. Is there anything I should look for in "junk foam" (i.e. thickness, ppi, etc) or is it all pretty much the same stuff? I would like to be able to dye it.