On Feb. 17, from 10 a.m. to 4:30 p.m., Discover Engineering Family Day will be held for the 26th time. Through the years, it has illuminated engineering to thousands of parents, teachers and children. Meet an astronaut. See one of NASCAR champion Jeff Gordon’s racecars. Watch an engineer ascend to the top of the National Building Museum. Family Day is designed to introduce children from ages 4 to 12 to the wonders of engineering. Engineers of all types will be on hand to share their love of the design-and-build process. The National Building Museum is at 401 F St. NW. engineeringfamilyday.org.