All the muggle teachers would think he was being so adorable, “pretending” not to know how potato batteries and mini-volcanoes work, fawning over the hard work the kids did on even the simplest the projects. And he comes every year, because after the kids have aged out (”gone on to some boarding school in Scotland,” the teachers say over bad coffee in the break room, “they didn’t seem the type”), he gets an honorary invitation to the fair every year, because he never stops making the kids feel smart and good.