A lower enclosure supports and protects a child's lower body and legs, and an upper enclosure supports and protects a child's head and shoulders. The lower and upper enclosures each have a bottom and each bottom is fixed to two side walls. A hinge connects the bottoms of the lower enclosure and the upper enclosure. Positioners position the enclosures relative to each other in a sitting position, with the bottoms making an obtuse angle, and a lying position, with the bottoms approximately in one plane. The positioners have a brace supporting the side walls and the bottoms.