Mike and Doug Starn are woven together about as much as their massive bamboo installation for the Metropolitan Museum of Art's rooftop garden. 

When the 49-year-old twin brothers describe their latest installation, Big Bambu: You Can't, You Don't, and You Won't Stop, they finish each other's sentences without missing a beat. 

"This piece is what it means to be alive.  To be alive is to be constantly growing and changing," they said. "And when we say alive, we don't just necessarily mean being human. A city is alive. A culture. A society."

The sculpture uses almost five thousand interlocking thirty and forty foot-long bamboo poles woven together with more than forty miles of rope. Twenty rock climbers were on board for the installation.

The crew will dwindle over time, but the piece itself will grow in both size and shape, ultimately measuring almost one hundred feet long by fifty feet wide and high, taking the shape of a cresting wave.

"When we first came up with the idea, it was just a conceptual art piece. And we had no idea how much fun it would be to build," they said. "Just tying together some bamboo poles in thin air and then you're standing there and growing...especially in this location." 

The exhibition is open through October 31, 2010.