LEGOLAND Discovery Center Chicago. Bring the kids to Chicago's LEGOLAND® Discovery Center for a day of brick-building adventure. With 30,000-square-feet of space this family-friendly attraction has activities for everyone: from an interactive pirate-themed playland to a factory tour where you can actually see how LEGO bricks are made. There's even a mini replica of famous Chi-town landmarks made from nearly 2-million LEGO pieces. Book and Save 15%! LEGOLAND Discovery Center Chicago.