Looking for a mind-bending project to challenge your building skills? Check out the LEGO Architect The White House 21006 AS IS Mostly Complete Pre Built Retired Set! This 12+ age level LEGO set features the award-winning Landmark Series and was released back in 2010. It's a perfect challenge for those who enjoy creating scale models from plastic materials without being burdened by any preconceived notions of what the building should look like.