It's a good month for nurturing your creativity: the California College of the Arts just launched a free course on making comics. And now comes another free course that will teach you the basics of animation. Pixar and Khan Academy have teamed up to create "Pixar in a Box," a free online curriculum that shows how Pixar artists use computer science and math concepts to create their innovative films. Topic include Rigging (how characters are brought to life with controls), Rendering (how pixels are painted using algebra ), Character Modeling (how clay models are transformed into digital characters using weighted averages) and more. Enter the self-paced series of lessons, each filled with instructive videos, here.