The invention relates to an inflatable bag having a device for emitting light comprising bag means made of a plastic material being hollow, airtight; at least one light emitting assembly disposed in the bag means, each assembly having a body, at least one cell and one light emitting element (e.g., bulb or light emitting diode (LED)) both disposed on the body; and a first connecting member made of a plastic material having one end coupled to the light emitting assembly and the other end fixed to a first portion of the inner surface of the bag means, wherein the cell and the light emitting element are actuable to conduct and emit light by activating a switch while the bag means being inflated to a predetermined shape.