I WANT TO end this list by talking a little more about the founding of Pixar University and Elyse Klaidman's mind-expanding drawing classes in particular. Those first classes were such a success--of the 120 people who worked at Pixar then, 100 enrolled--that we gradually began expanding P.U.'s curriculum. Sculpting, painting, acting, meditation, belly dancing, live-action filmmaking, computer programming, design and color theory, ballet--over the years, we have offered free classes in all of them. This meant spending not only the time to find the best outside teachers but also the real cost of freeing people up during their workday to take the classes. So what exactly was Pixar getting out of all of this? It wasn't that the class material directly enhanced our employees' job performance. Instead, there was something about an apprentice lighting technician sitting alongside an experienced animator, who in turn was sitting next to someone who worked in legal or accounting or security--that proved immensely valuable. In the classroom setting, people interacted in a way they didn't in the workplace. They felt free to be goofy, relaxed, open, vulnerable. Hierarchy did not apply, and as a result, communication thrived. Simply by providing an excuse for us all to toil side by side, humbled by the challenge of sketching a self-portrait or writing computer code or taming a lump of clay, P.U. changed the culture for the better. It taught everyone at Pixar, no matter their title, to respect the work that their colleagues did. And it made us all beginners again. Creativity involves missteps and imperfections. I wanted our people to get comfortable with that idea--that both the organization and its members should be willing, at times, to operate on the edge. I can understand that the leaders of many companies might wonder whether or not such classes would truly be useful, worth the expense. And I'll admit that these social interactions I describe were an unexpected benefit. But the purpose of P.U. was never to turn programmers into artists or artists into belly dancers. Instead, it was to send a signal about how important it is for every one of us to keep learning new things. That, too, is a key part of remaining flexible: keeping our brains nimble by pushing ourselves to try things we haven't tried before. That's what P.U. lets our people do, and I believe it makes us stronger.