这是一个鸟窝，内部铺上3D打印机产生的冲刷废料，社区内的小鸟可以把这个当做自己的巢，并在里面产蛋。我不确定是否会有鸟来，所以我放了两个鸡蛋进去模拟，之后就这样挂在窗口等鸟入住。

This is a bird's nest, covered with scouring waste generated by 3D printers. Birds in the community can use this as their own nest and lay eggs inside. I'm not sure if there will be birds coming, so I put two eggs in to simulate it, and then hung them at the window waiting for the birds to move in.