Reply A LEGOLAND Discovery Center is opening in the Bay Area Monday with a ribbon-cutting ceremony at the Great Mall in Milpitas. (Jack Taylor/Getty Images) MILPITAS, CA — A LEGOLAND Discovery Center is opening in the Bay Area Monday with a ribbon-cutting ceremony at the Great Mall in Milpitas. The new Discovery Center, the first location built in California, is geared towards children ages 3-10, with a series of educational and interactive attractions for families to play with. In the 31,000-square-foot space, attendees can explore a 1.5 million-brick replica of the Bay Area, take an interactive train ride on the Imagination Express, watch 4D LEGO shorts and learn to build in master classes.