Nag Odekar, COO of Forevercar.com, is a Lego fanatic. Nag fell in love with Chicago architecture and he builds 1:250-scale replicas of Chicago's most famous buildings. His most prized piece? The Sears Tower, now known as Willis Tower. It stands over six-feet tall and is made out of more than 10,000 Lego bricks. This is the last part of Bloomberg's "Off the Clock" series.