Abstract: A detachable illuminating accessory for use in a mask or costume, and the associated mask or costume, in which the detachable illuminating accessory includes a top housing and a base housing, defining a cavity therebetween for one or more lighting elements and power elements providing to the lighting elements whereby the base housing includes a reversible attachment element for securing and releasing the accessory to a mask or costume, the top housing and the base housing reversibly contacting together to permit selective electrical connection between the one or more lighting elements and the one or more power elements and to provide activation of the one or more lighting elements or deactivation.

Abstract: A costume for simulating an animal comprises an upper torso covering portion which extends to at least one shoulder, a sleeve and a hand puppet. The fabric, texture, pattern, look and feel of the sleeve coordinates with that of the shoulder to which the sleeve is attached so that the costume presents a realistic and whimsical long necked animal whereby the neck is the sleeve surrounding the contained arm of the wearer. Preferably, the hand puppet is worn by the wearer's hand and has an upper jaw or beak and a lower jaw or beak and the fingers within the hand puppet control the movement of the beak to visual and entertaining advantage.