Play yards and methods of operating the same are disclosed. An example play yard includes a plurality of posts, a lower frame supported by the plurality of posts, and a top frame supported by the plurality of posts when the play yard is in an erected position. The top frame includes a first rounded rail; a second rounded rail opposite the first rounded rail; a third rounded rounded rail between the first rounded rail and the second rounded rail; and a fourth rounded rail opposite the third rounded rail. In the erected position, the third rail curves upward and a center of the third rail is at a first height and a center of the first rail is a second height. The second height is closer to the lower frame than the first height.