Seven years in the making, The Source: Where Curiosity Sparks Discovery gallery recently opened in the Thomas Jefferson Building. It's a first-of-its-kind experiential research gallery for young people. Here, the past unfolds in multiple formats. Voices echo from across time, and collection items pull young visitors into the role of budding researchers. From the moment they enter the gallery, kids and teens (it's aimed at ages 8-15) are encouraged to ask questions, make connections and explore history through a blend of nostalgia and modern technology.