Abstract: A system for controlling light in a facility may include at least one rail longitudinally affixable to an inner portion of a frame of the facility between a first end and a second end of the facility and at a rail-height above a floor of the facility; and at least one opaque/reflective covering tightly and opaquely affixable to the inner portion of the facility frame at a cover-height above the facility floor in a first plane that faces the facility floor and slidably connectable to the at least one rail, the at least one opaque/reflective covering being extendable along the at least one rail between a first covering position and a second covering position to opaquely cover respective at least one longitudinal section of the facility in the first plane when in the second covering position, without substantially covering the facility walls.

Abstract: A system for controlling light in a facility may include at least one rail longitudinally affixable to an inner portion of a frame of the facility between a first end and a second end of the facility and at a rail-height above a floor of the facility; and at least one opaque/reflective covering tightly and opaquely affixable to the inner portion of the facility frame at a cover-height above the facility floor in a first plane that faces the facility floor and slidably connectable to the at least one rail, the at least one opaque/reflective covering being extendable along the at least one rail between a first covering position and a second covering position to opaquely cover respective at least one longitudinal section of the facility in the first plane when in the second covering position, without substantially covering the facility walls.

Abstract: A stroller device comprising at least one carriage, the carriage comprising a support unit for supporting at least one person, typically an infant, a wheels assembly coupled to the support unit, an engagement element for engaging the carriage to another such carriage and a pivoting element coupled to the support unit allowing rotating the support unit with respect to the carriage. The support unit may be rotatably reoriented so as to allow transporting the stroller device such that the support unit of the carriage and the other support unit of the other carriage can be aligned in a train state or alternatively in a side-by-side state.

Abstract: A stroller device comprising at least one carriage, the carriage comprising a support unit for supporting at least one person, typically an infant, a wheels assembly coupled to the support unit, an engagement element for engaging the carriage to another such carriage and a pivoting element coupled to the support unit allowing rotating the support unit with respect to the carriage. The support unit may be rotatably reoriented so as to allow transporting the stroller device such that the support unit of the carriage and the other support unit of the other carriage can be aligned in a train state or alternatively in a side-by-side state.