The machine that runs on hot or cold air
This is a neat little machine that you can build up and assemble into your own little engine that when placed on top of a hot cup of coffee, the machine actually begins to work, the hot air rises and pushed the cylinders up, as they are on a sort of crank shaft as one reaches the top the other begins to lift and so forces the other one down, just like an engine.
It can also work with extreme cold as well, the principle being the same.
This would make an amazing gift for a young engineer, priced at $29.
Source [Oh Gizmo]
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Tags: Consumer, crank_shaft, cup_of_coffee, cylinders, extreme_cold, Funny, Gadgets, Games, hot_air, Misc
