Discover and experience the principle of steam power in a model-like way.
The Putt-Putt- or Puff-Paff-Boat is a toy boat with water pulse propulsion (pulsed waterjet). The simple motor has no moving parts such as pistons, valves or wheels. A candle or other heat source serves as the energy source. Fill water into one of the two tubes at the end of the boat until it flows out again in the other tube. Now carefully place the boat on the water. Place the flame in the boat under the kettle. The ride starts after a few moments.