This scary baby is 10cms in length and she is called Boo. The doll is made of composite materials with a cloth body. The phrase boo dates back several hundred years and it is thought to have originated in Scotland during the 18th century and was used to frighten children. Boo is a word that is closely associated with ghosts and Halloween. English people began using the word boo around the 1820s. Other versions of the word boo, such as bo and boh, are featured in literature dating back at least half a century. The also word appears in books and in early movies and it replicates the Latin word boare and the Greek word Boav, which mean to cry or roar. Walter W. Skeat in his 1870 work wrote about children warding off Geese by shouting boo. Many scary words have the boo sound in them. For example boogie man. The word boo can appear very scary, but many other daily words have been derived from it, such as beautiful.