Kinetic Hot Wheels Sculpture

It includes 1,200 custom-designed cars and 18 lanes; 13 toy trains and tracks; and, dotting the landscape, buildings made of wood block, tiles, Legos and Lincoln Logs. The crew is still at work on the installation.

In “Metropolis II,” by his calculation, “every hour 100,000 cars circulate through the city,” Mr. Burden said. “It has an audio quality to it. When you have 1,200 cars circulating it mimics a real freeway. It’s quite intense.”