Scrapers are common throughout the south. One of the most common types is a notched stick, played by dragging a shell across the stick at various speeds. It is used both as a women's court instrument and by children in teasing games. Among the Yoruba, an iron rod may be used as a replacement for a stick. Rattles are common, made of gourds containing seeds or stones are common, as are net-rattles, in which a string network of beads or shells encloses a gourd. Rattles are typically played in ritual or religious context, predominantly by women.