Co-sleeping, also calle the family bed, is a practice in which babies and young children sleep with one or both parents. It is standard practice in many parts of the world outside of North America, Europe and Australia, although even in these countries children sometimes crawl into bed with their parents. One 2006 study of children age 3-10 in India reported 93% of children co-sleeping. Co-sleeping was widely practiced in all areas up until the 19th century, until the advent of giving the child his or her own room and the crib. In many parts of the world, co-sleeping simply has the practical benefit of keeping the child warm at night. Co-sleeping has been relatively recently re-introduced into Western culture by practitioners of attachment parenting. A 2006 study of children in Kentucky in the United States reported 15% of infants and toddlers 2 weeks to 2 years engage in co-sleeping.