When I was a kid, my lack of imagination always steered me toward building houses out of our piles of Lego bricks. I never built airplanes or spaceships or any of the other things kids usually built.

Inside Itatiana Robinson’s family home in McKinney, she and her partner De’Arion Wafer play on a miniature vintage Pac-Man arcade. But instead of being made out of wood and metal, it’s made of tiny ...