Aliaksei Zholner (previously) is known for making fully functioning models from cardboard and paper. His latest piece is a miniature 18-key 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. The “strings” of the piano are created from paper strips connected to a tension mechanism similar to a guitar and struck by hammers made from paper and cardboard. The black cardboard body is branded with Zholner’s name above the keys in the style of popular piano makers such as Bösendorfer and Bechstein. 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.