The only reason I invented the time machine was to get to my son’s fifth-grade graduation ceremony, since I’d missed it the first time. After a decade of working in my lab every night and weekend (during which Robbie became increasingly distant), I successfully went back and arrived at his graduation on time. Over the next ten years, I traveled the world to show off my invention, becoming a billionaire. But just like before, Robbie grew aloof. Nowadays he won’t even speak to me, can’t acknowledge how comfortable I’ve made our family. Sometimes kids just are the way they are.