A small brass cannon the fires a rubber stopper when a small amount of Liquid Nitrogen is poured inside. A small light bulb is turned on until the battery's chemical reaction slows down as it freezes in liquid nitrogen. A light bulb connected to a coil of copper wire and a battery does not glow due to resistance in the wire. When the copper wire is coiled in the liquid nitrogen the light bulb shines.

Equipment
Cooper Pipe		LN2		Dewar
Copper Coil and Light		Battery and Light		Rubber Stoppers