Lydia saw me walking through the kitchen and called me over to where she was sitting folded upside down in a nearby chair. “Come look at the house I made this morning in Minecraft,” she said. I smiled and tried to find a way to sit down next to her. This was a common routine in our house. Lydia spends most of her days designing houses in various video games, or drawing blueprints in one of her sketchbooks that are scattered around on every couch chair and table, or digging strange mansions out of snowdrifts in the backyard, and I spend most of my days being given tours of these various works of modern architecture. She angled the tablet in my direction and showed me…