Pixar in a box:
Introduction to animation (animating a ball):
https://www.khanacademy.org/partner-content/pixar/animate/ball/a/start-here-animation
Animating a character with bezier curves:
https://www.khanacademy.org/partner-content/pixar/pixar-rigging/code-character/pi/project-2-animate-your-character
Rigging a face:
https://www.khanacademy.org/partner-content/pixar/pixar-rigging/intro-to-rigging/pi/rigging-knicks-face
Combinatorix:
https://www.khanacademy.org/partner-content/pixar/crowds/crowds-1/v/intro-crowds?ref=Pixar_Recommended_videos
https://www.khanacademy.org/partner-content/pixar/crowds/crowds-1/a/hands-on-activity