If you’d driven along Pittsburgh’s Webster Avenue decades ago, you may have caught a glimpse of Black suffragist and civil rights activist Daisy Lampkin at her home. The red-brick building on the corner stretches three stories tall, with ornamental cornices and rows of windows. It was Lampkin’s house for four decades, when she wasn’t traveling for work with the NAACP. The building still stands today—and now, so does a miniature version of it. An eight-inch model of Lampkin’s residence is the newest addition to Carnegie Science Center’s century-old Miniature Railroad…