Book excerpt: In 2010, Burj Khalifa achieved the title of Tallest Building in the World. The 2,717-foot structure, located in downtown Dubai, has 160 habitable floors and can accommodate more than 12,000 people. Its 54 elevators take only 60 seconds to reach the world's highest observation deck on the 124th floor. Suitable for ages 10 and up with adult supervision, this two-foot-high replica model of the ultramodern building appeals to hobbyists of all ages and makes a great family activity. Complete, easy-to-follow instructions include detailed diagrams for ease of assembly.