Rattlebox can refer to several different things, most commonly a type of plant or a toy. As a plant, rattlebox refers to any of several species within the genus Crotalaria. These plants are characterized by their inflated pods that, when dry, contain seeds which rattle when shaken. The common rattlebox, Crotalaria spectabilis, is an herbaceous legume native to Asia but naturalized in many parts of the world. It is often grown as a cover crop or green manure. Some species of rattlebox contain toxic alkaloids, and care should be taken to identify them correctly. Another common variety is the smooth rattlebox, Crotalaria pumila. As a toy, a rattlebox is a simple percussion instrument. It typically consists of a hollow container, often made of wood or plastic, filled with small objects like beads, seeds, or pebbles. When the container is shaken, these objects move around and produce a rattling sound. Rattleboxes are common children's toys, used for sensory exploration and developing motor skills. They are often brightly colored and easy for small hands to grasp.