You can easily practice calligraphy with water and a brush. Even though it is written with water, you can write clearly and beautifully. No need to worry about staining your clothes or surroundings. The calligraphy surface dries in a few minutes, so you can use it over and over again. This product is environmentally friendly and does not require any sumi or semi paper. The grid is ruled for balance and is perfect for people of a wide range of ages from children to the elderly. It can also be used to practice ink drawing while adjusting the ink intensity and thickness of the brush.