Kate Byrd’s first priority when renovating her basement was to make a miniature “house” in the spare space beneath the stairs, just like she’d seen countless times on Pinterest. Her contractor had never made anything like it before, but was happy to collaborate with Byrd on the design. “The door is actually made from wood from my grandparents’ farm,” Byrd says. Her daughters, Emmerson, 4, and Addison, 3, had plenty of input, too: The playroom houses a cozy reading nook, and has chairs, artwork, and a sparkly chandelier. And when the girls don’t want to come upstairs for dinner? “We’ll just have a picnic in their house,” Byrd jokes.