4D Cityscape allows you to build the history of the USA over the 4th Dimension of Time. Starting with the base layer, our unique jigsaw play showcases the evolution of the USA - based on territorial expansion from the year 1783 to 1900's. You then assemble the 2nd layer "modern" jigsaw map - which showcases the formation of all 50 states in a time sequence based on each State's date of established statehood. The third layer is constructed using the 4D Time Poster where 93 of the most famous US monuments & buildings are placed into the puzzle in the order that they were constructed. The puzzle includes 93 plastic building replicas that depict the Country as far back as 1450 to modern day. The puzzle includes such iconic structures as Arches National Park, Mount Rushmore, and the St. Louis Arch. The buildings fit into pre-cut holes in a traditional 2D jigsaw puzzle that form the country's layout and Rocky Mountains. The product includes a Time Poster that directs you through time as you rebuild America's famous history. Details: USA over time 26" x 17" x 2.5" Over 950 pieces Includes 4D time poster For ages 8 and up