Abstract: The front end of a body portion on a hat (e.g. cap) may be continuous and the rear end may have separable sections. The hat may have a visor to form a cap defined by two (2) cloth layers separated by a backing member (e.g. cardboard). The backing member and the visor lower layer may have matching apertures to receive a module defined by a container and a cover pivotable on the container between open and closed positions. A switch, a battery and a printed circuit board may be disposed in the container. The switch may be manually closed, with the container closed, to energize electrical circuitry on the board. Such energizing may illuminate a member (e.g. LED) preferably disposed on the body portion and optically coupled to a display member to illuminate an individual design on the display member. The display member may be attached to the continuous front external surface of the body portion. Alternatively, the hat may have a band on the internal surface of the body portion.