The ULTIMATE jigsaw puzzle, Overall Winner Gift of the Year 2010 and the first to use TIME as the fourth dimension! First assemble the base, which is a jigsaw …………… Then add the second "street" level jigsaw - the streests glow in the dark for added impact …… Then, with the aid of the Time Line Poster, start to add the buildings in the chronilogical order in which they were built. The dates start from 1078 and continues until 2014 - nearly 1,000 years of history!! You can see the skyline changing over this time! The jigsaw pieces are made from high quality foamboard, so that they lock firmly together, and the scale models of the buildings are high quality injection mouldings, and slot securely into trhe foamboard. There are over 1,200 pieces in the jigsaw - consisting of 1,157 jigsaw pieces, 73 model buildings, a full colour Time Line poster, a magnifier and full instruction leaflet.