[0:00]The tubes are filled with water, which travels to a tank that sits on top of the boat.
[0:06]And when a candle is lit underneath, some of the water turns to steam, which creates an expanding bubble in the tank.
[0:14]This forces water out of the end of the boat, but since the pipes are cooler than the tank, the air shrinks again and moves back toward the tank, sucking in water from the lake.
[0:26]The air expands again when it heats up and shrinks once it cools down, and this constant movement pushes the boat along without any moving parts.
