Look what happens when a person has too much idle time in his hands. This guy decided to make his keyboard a garden, a garden of sprouts to be exact. First he inserted some cotton like material below the keys and then probably put the seeds that must have been previously moistened. Then the sprouts just came out. Hehehe.
I guess this is just for display purposes, there’s no way that you can have those sprouts there and still efficiently use the keyboard.