An occupant restraining device that can maintain the internal pressure of a bag at a high level is provided. The methods include the steps of manufacturing a sole element preform from a polymer material with a thickness varying in the transverse andor longitudinal direction depending on the desired density distribution and the press-forming of the sole element preform in a forming tool to form the finished sole element from the sole element preform. The guide may receive incentives for assisting the player, and may also provide verbal commands and game commands to the first terminal in response to observing gestures of the player. The wafer are inserted into a device.