Nanoblock Chrysler Building A classic example of Art Deco architecture, this New York City skyscraper was the world's tallest buiding when completed in 1931 (390 pieces, level 3) Nanoblocks are a superior building experience with greater challenge, sophistication and detail than any other construction set Nanoblocks are a superior building experience with greater challenge, sophistication and detail than any other construction set With bricks as small as 4mmx5mm and manufactured to the highest tolerances for a perfect fit, make amazing 3D art that fits in the palm of your hand The Smaller the Brick the Better the Build; all sets come with detailed step by step instructions, for ages 12+