A folding play yard includes a collapsible play yard frame movable between a retracted stored position and a deployed position, wherein the frame defines a baby receiving portion in the deployed position with a floor and bordering side walls around the periphery of the floor, wherein the frame includes a plurality of corner posts forming at least a portion of a support for the side walls with the play yard in the deployed position, wherein the corner posts are constructed to remain substantially parallel to a vertical axis of the play yard as the play yard moves between the closed and the open position.