YouTuber Aliaksei Zholner crafts tiny, working machines entirely from paper. Last year, Zholner wowed viewers by making (and demonstrating) fragile-yet-functional paper V8 and rotary engines—and now, Gizmodo reports, his latest mechanical creation is also musical. As the crafty engineer explains in a blog post, his wife suggested he build a paper music box for his next project; Zholner decided to take the request a step further by building a working paper pipe organ.

The organ has 18 playable keys; they activate a series of paper pipes, which, in turn, receive air flow from a plastic balloon. In the video below, you can watch Zholner assemble—and play—the lightweight musical instrument.

[h/t Gizmodo]