Ball-jointed dolls (BJDs) are a type of articulated doll made from resin or plastic, featuring a unique joint system that allows for a wide range of movement. These dolls are characterized by their spherical joints, which enable them to pose in various positions, making them popular among collectors and hobbyists. BJDs come in various sizes and styles, often resembling human figures or fantasy characters. Many enthusiasts customize their dolls by painting, changing wigs, or creating outfits, allowing for personal expression and creativity. The community surrounding ball-jointed dolls often shares tips, photos, and stories online.