The term street chilren is used to refer to children who live on the streets. They are deprived of family care and protection. Most children on the streets are between the ages of 10 and 14 years old, and their populace between different cities is varied. Street children, or "street urchins", are, in particular, those that are not taken care of by parents or other protective guardians. Street children live in abandoned buildings, containers, automobiles, parks, or on the street itself. A great deal has been written defining street children, but the primary difficulty is that there are no precise categories, but rather a continuum, ranging from children who spend some time in the streets and sleep in a house with ill-prepared adults, to those who live entirely in the streets and have no adult supervision or care.