use this transcript: Several years ago here at TED, Peter Skillman introduced a design challenge called the marshmallow challenge. And the idea's pretty simple: Teams of four have to build the tallest free-standing structure out of 20 sticks of spaghetti, one yard of tape, one yard of string and a marshmallow. The marshmallow has to be on top. And, though it seems really simple, it's actually pretty hard because it forces people to collaborate very quickly. And so, I thought this was an interesting idea, and I incorporated it into a design workshop. And it was a huge success. And since then, I've conducted about 70 design workshops across the world with students and designers and architects, even the CTOs of the Fortune 50, and there's something about this exercise that reveals very deep lessons about the nature of collaboration, and I'd like to share some of them with you. So, normally, most people begin by orienting themselves to the task. They talk about it, they figure out what it's going to look like, they jockey for power. Then they spend some time planning, organizing, they sketch and they lay out spaghetti. They spend the majority of their time assembling the sticks into ever-growing structures. And then finally, just as they're running out of time, someone takes out the marshmallow, and then they gingerly put it on top, and then they stand back, and -- ta-da! -- they admire their work. But what really happens, most of the time, is that the "ta-da" turns into a