Abstract: In one aspect, the present disclosure is directed to an assembly for attachment to a crib. The assembly may include a cross member configured to span a width of the crib. In addition, the assembly may include a substantially U-shaped cross member connector configured to receive one end of the cross member. Also, the assembly may include a substantially U-shaped crib rail connector configured for attachment of the cross member connector, the crib rail connector further configured to be non-destructively attached to and removed from a side rail of the crib.

Abstract: A child containment structure includes a floor and a sidewall connected to the floor and defining a unitary structure with the floor. The sidewall includes at least one side panel formed at least partially of an air-restricting material and at least one ventilation panel positioned between the floor and the side panel. The ventilation panel has a maximum height smaller than that of the side panel, and the ventilation panel permits air flow between an interior of the containment structure and an exterior of the containment structure along a sleeping surface of the child containment structure.