4D Skyline Time Puzzle - Washington DC. 4D Cityscape recreates world famous city skylines not only in three dimensions using scale model buildings, but also along the axis of fourth dimension time, spanning over 100 years of its architectural history. The puzzle includes many detailed plastic replicas that depict the city as it appeared as far back as 1800 through to the present and future. Each puzzle includes famous monuments, buildings, skyscrapers, bridges, and more. The streets glow in the dark, emphasizing the city"s glow. Includes a time poster that includes a history of the city and an online educational feature includes more than 2000 facts. Ages 8 and up.