Prefab Proponent Jennifer Siegal Explains the Wind-Up Toy She Always Keeps on Her Desk

I founded my design firm, Office of Mobile Design, in 1998 to work on transportable and demountable environments—what many people refer to as prefab or container homes. Ever since I can remember, I’ve been fascinated with mobility. As a child, I turned wood blocks and Hot Wheels into cities of flying cars, ran a mobile candy store, and broke my knee while riding my bike down a hill in front of my house with roller skates on. It’s in my blood.