A light-guide plate includes an incident surface receiving light, an upper surface extended from a first side of the incident surface, a lower surface opposed to the upper surface and a plurality of first prisms protruding from the upper surface and spaced apart by a separation distance. The evaporative cooling mechanism defines a passageway in axial alignment with tubing drawn in a straight drawing direction and includes a nozzle for producing a fine fluid for cooling the tubing. These compounds may be useful as medicaments for the treatment of proliferative disorders as well as other diseases involving, relating to or associated with dysregulation of histone deacetylase. In yet another embodiment a blocking layer may be inserted into a contact stack. It allows the student to apply the flotation device to the doll, and remove it as required, and place the doll in the water to float with the flotation device or sink without it. The method including: providing the munition with a power supply having a piezoelectric material for generating power from a vibration upon impact of the munition; and initiating detonation time-out circuitry to disable detonation of the munition after a predetermined time.