A baby crib rail device is provided for assisting an infant with relieving pain associated with teething. The device comprises a plurality of crib rail covers removably secure to the guardrail of a child's crib or playpen. Rail covers consist of channels having an inverted “U” shaped cross-section. The covers are secured to an infant crib guardrail by placing the rail through the open bottom of a crib rail cover and pushing downward to secure its location. Sections of rail cover are removably securable to each other in an end-to-end structure that results in an elongated crib rail cover. The covers may be constructed of a soft, durable, sanitizable material such as rubber or plastic. The surfaces of the different rail covers may have a variety of surface contours to provide different types of gum stimulation for teething infants. Rail covers may be arranged in any desired configuration according to the needs or interests of a child.