And I tried something interesting. I thought, let's up the ante, once. So I offered a 10,000 dollar prize of software to the winning team. So what do you think happened to these design students? What was the result? Here's what happened: Not one team had a standing structure. If anyone had built, say, a one inch structure, they would have taken home the prize. So, isn't that interesting? That high stakes have a strong impact. We did the exercise again with the same students. What do you think happened then? So now they understand the value of prototyping.