Listen, I’m really easy to distract. All I need is a fun doohickey or an interesting thingamajig, and I’m entranced. If said item runs automatically, it’s practically fatal; I could watch it for hours. So, imagine how I felt when I saw a 3D-printable marble run that uses a motor to push marbles from the bottom back to the top. If I ever make this, my productivity is going to tank.