Here's how to make a fun boat powered by steam "...it wasn't until I was an adult that I saw my first putt putt steam boat, chugging away in an outdoor market in Bangladesh-- in Southern Asia-- one of the poorest countries in the world. Made mostly from a recycled milk tin, it sounded like a tugboat and it really moved--all efficiently powered by a little vegetable oil lamp. How could such a cool thing have existed without my knowing about it?" Thanks Jos! Link.
HOW TO - Make a putt putt (pop pop) steam boat
Here's how to make a fun boat powered by steam "...it wasn't until I was an adult that I saw my first putt putt steam boat, chugging away in an outdoor market in Bangladesh-- in Southern Asia-- one of the poorest countries in the world. Made mostly from a recycled milk tin, it sounded like a tugboat and it really moved--all efficiently powered by a little vegetable oil lamp. How could such a cool thing have existed without my knowing about it?" Thanks Jos! Link.
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The terminally lazy may buy pre-made putt-putt boats from American Science and Surplus:
http://www.sciplus.com/category.cfm?category=26
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