An artist / modeler going by "Shigeryu" on Twitter 3D-printed plastic keys, knobs, and a grand piano shell for the Piano in their Nintendo Labo Variety kit. When Nintendo releases a functioning toy made out of biodegradable cardboard, you gotta do what's right and slap layers of plastic all up on that.
Just kidding. Shigeryu's made something remarkable here, something worth keeping around for a long time. The video outlines how to make and install new plastic piano keys, then goes on to show how to make new plastic knobs. The Piano shell is still a work in progress; you can follow Shigeryu's Twitter account for updates.
This isn't Shigeryu's first time at the plastic Switch accessory rodeo (if such a rodeo even exists). They've also made a "Switchcade," a miniature arcade cabinet shell that holds your Switch's screen and lets you slot in Joy-Cons to function as the unit's "arcade stick."
The Nintendo Labo isn't lighting any fires with its sales numbers (which is a good thing, given how combustible cardboard is), but it clearly has a dedicated community of makers intent on tinkering with the model kits. That slow-burning interest might be what helps keep Labo at least somewhat relevant across the months.