A team of interdisciplinary scientists 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 per cent of its original brightness. In addition, the fiber can be powered wirelessly and manipulated physically using magnetic forces.