Abstract: At least one foldable opaque shade device is disposed adjacent to an upright post of a playard that can block lights from coming into the playard and provide a comfortable environment for a baby/toddler inside. The at least one shade device is capable of selectively setting in a folding status or an unfolding status. When the at least one shade device is set to the folding status, it is folded adjacent to the standing post at one side of the playard via a rotary axle or other type of folding mechanism. The at least one shade device can be unfolded from the standing post(s), and the lateral surface of the playard between the two standing posts is fully covered by the shade device.