I love to reuse old packing material from computers, stereos, and other things. Here is a a larger piece taken from an old computer box. I did no cutting whatsoever. I painted it up with a gray base coat and splattered black and white paint to simulat concrete. After a few months my five-year-old son played as especially rough miniatures battle on it, and damaged it by poking holes through the main floor, taking chucks of styrofoam out with his fingers, and breaking off one leg. I then reglued the broken end, and repainted all the damage he did with darker hues to represent battle damage!