Imagine a puzzle where the fourth dimension is time. As a city rises beneath your fingers, the buildings are added in chronological order, so you see the skyline evolve as it did in real life. This award-winning puzzle is also a history lesson - and, when you're through, you have a miniature model of a major urban center. Specify city; 27 are available (see below), each 700-1,230 pieces. Finished sizes range from 18 ½" x 17" to 15" x 26". Ages 8 and up. Available cities: New York, London, Washington D.C., Chicago, Las Vegas, Hong Kong, Paris, Tokyo, Sydney, Melbourne, Berlin, Prague, Warsaw, Boston, Seattle, Los Angeles, Barcelona, Dubai, Rome, Taiwan, Shanghai, Macau, San Francisco, St. Petersburg, Osaka, Toronto, Calgary, plus USA.