Abstract: A carton for gift merchandise is formed from a single blank that is cut and folded to be set up into a carton having a double-thickness wall between layers of which a battery powered signal generator is concealed and protected. Another wall of the carton, having an integral hinged connection to one of the layers of the double-thickness wall, is arranged to be a closure for the carton which has to be unfolded or swung open for opening of the carton and which has an actuator connection with the generator that starts it when the carton is opened. Blanks for both cube-shaped and pyramidal cartons are disclosed.