A Miniature Piano,

that is tuned and actually works, 

 but here is the thing,

 it is made out of paper,

 Aliaksei Zholner, who we have featured before is known for making fully functioning models from cardboard and paper, 

 what makes this piano outstanding is that even the strings are made of paper, 

 paper strips are connected to a tension mechanism similar to a guitar and struck by hammers made from paper and cardboard,

 the piano that is tuned to play popular and classical pieces such as Fryderyk Chopin’s Polonez b-moll, Ludwig van Beethoven’s Für Elise, and Scott Joplin’s The Entertainer, a more detailed explanation of the construction (in Russian) is available on the Only Paper forum, and you can view more of his paper demonstrations on his Youtube channel, strings of a piano made from paper, amazing!

When I Hear The Term Engineer,

I always think of some working in or on metal,

as in a steam train or car manufacturing plant, or some one working in heating, telephones or a shipyard, you get the idea, so it came as a surprise to read about a paper engineer,

and here is an example of his work, a fully functioning 18 key pipe organ, it works just like the real thing, creating tones with the aid of reeds, but there is a limit as to what paper engineer Aliaksei Zholner can do, the organ needs air and a paper pump was a step too far, so he uses a balloon to provide the puff,

and if you think that is impressive wait till you see this, a working V8 engine with moving pistons and crankshaft,

absolutely amazing!