The most important aspect of doing this work is the children's experience with charcoal as a medium for art. By toying around with the different effects it can create, they come to understand that between black and white lies shade upon shade of gray.
重要的是體驗炭筆的質感，並利用塗抹及筆觸，理解從黑到白之間，有很多不同層次的灰色階層。