A team has developed flexible fibers with self-healing, light-emitting and magnetic properties. The scalable hydrogel-clad ionotronic nickel-core electroluminescent (SHINE) fiber is bendable, emits highly visible light, and can automatically repair itself after being cut, regaining nearly 100% of its original brightness. In addition, the fiber can be powered wirelessly and manipulated physically using magnetic forces.A team has developed flexible fibers with self-healing, light-emitting and magnetic properties. The scalable hydrogel-clad ionotronic nickel-core electroluminescent (SHINE) fiber is bendable, emits highly visible light, and can automatically repair itself after being cut, regaining nearly 100% of its original brightness. In addition, the fiber can be powered wirelessly and manipulated physically using magnetic forces.[#item_full_content]