These little tin toy live steamboats will chug along with a putt putt sound for approximately 15 to 25 minutes on a candle flame or with a small amount of olive oil. Enjoy a mesmerizing joy to watch and listen to this little tinny tin toy. You can Run them in the sink, bathtub, swimming pool, fishpond, etc. Our pop pop candle boat is powered by a candle flame to generate steam which moves the boat rapidly in water with a putt putt sound. The kit comes with a candle and instructions to start the engine and watch it go.