There are a few things to try when attempting to remove crayon marks from woos furniture. First, try cleaning with Murphy's Oil Soap. This should remove the crayon without harming the finish. If not, try mineral spirits, which should also be safe on the finish. WD-40 or Avon Skin-So-Soft should also work, but test on a non-visible area first. Non-gel toothpaste should also be a safe alternative. If all else fails, try applying a little heat from a hair dryer to soften the crayon, then blot with paper towels.