Wood was used for making many things which went from ceremonial to household artifacts, canoes for transportation and houses. One of the techniques for working wood was to burn the inside out of the piece you would prepare. The trick was to keep the fire burning in the right places by blowing on it. When the first fire spread to the wrong places, it was put out by wetting the wood. The outside of the piece as well as the burned parts inside were shaped by cutting and scraping. This explains that there existed a lot of different scrapers. Shell was one of the materials frequently used for making scrapers.