The DC region’s largest, free family festival has it all: Real fun. Real tools. Real skills for the future. Dive into KID City, where kids and families will build a city of the future—from the ground up—for a one-of-a-kind, interactive experience. Experiment with different tools and materials, build new skills from coding to design engineering, and help a city rise through this unique communal project. Exhibits, demos, and live performances will inspire kids and adults alike and show the ties that unite us. FutureFest is on Sunday, Sept. 15, noon to 5 p.m., at Veterans Plaza and the Silver Spring Civic Center, One Veterans Place, Silver Spring MD. kid-museum.org/futurefest.