Additionally, legislation typically defines what constitutes daycare (e.g., so as to not regulate individual babysitters). It may specify details of the physical facilities (washroom, eating, sleeping, lighting levels, etc.). The minimum window space may be such that it precludes day cares from being in a basement. It may specify the minimum floor space per child (for example 2.8 square metres) and the maximum number of children per room (for example 24). It may mandate minimum outdoor time (for example 2 hours for programs 6 hours or longer). Legislation may mandate qualifications of supervisors. Staff typically do not require any qualifications but staff under the age of eighteen may require supervision. Some legislation also establishes rating systems, the number and condition of various toys, and documents to be maintained.[67] Typically[citation needed], once children reach the age of twelve, they are no longer covered by daycare legislation and programs for older children may not be regulated.
More specifically, further research indicates that children being cared for by siblings or similarly-aged children (a trend more commonly seen in agriculturally-based cultural communities) have certain psychological and developmental effects on those being cared for. These effects include but are not limited to: mother-child attachment, emergence of childhood developmental stages, formation of playgroups, development of social responsibility, sex differences, personality differences, cognition, and motivation and performance in the classroom.[2]