While browsing I found this site: http://www.sciencetoymaker.org/boat/index.htm It has detailed instructions for making a candle-powered (!) boat. All you need is milk carton(waterproof paper !!) for the boat tin can for the boiler,straws , silicone, staples (ok maybe I forgot something ) ...mine is ready..the boiler makes a funny noise..and it is fast! .. ..I think I am going to paint it..