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 years of its architectural history. The puzzle includes many detailed plastic replicas that depict the city as it appeared as far back as 1916 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. The online educational feature includes more than 2000 facts. Details: Chicago over time 19" x 19" x 5" assembled size Over 950 pieces (puzzle pieces and structures) Streets glow in the dark Includes time poster For ages 8 and up