A cotton ball is a small, round mass made from soft, fluffy cotton fibers. It is commonly used for various purposes, including personal hygiene, makeup application, and cleaning. Cotton balls are lightweight and absorbent, making them ideal for applying or removing liquids like toner or nail polish remover. In addition to personal care, cotton balls can be used in arts and crafts, as well as for educational projects. They are often used in science experiments to demonstrate concepts like buoyancy or to create models of clouds. Cotton balls are versatile and widely available in stores.