This is a video of Pixar director (Monsters, Inc., Up, Inside Out, and the coming-this-fall Soul) Pete Docter discussing and demonstrating how to make flip books from the comfort of his closet (what is all that stuff blowing around? You need to invest in a HEPA filter, bro. Also, who would have thought a Pixar director’s closet would look just as sad as mine?). Honestly, I always assumed flip books were a thing that everyone grew up just knowing how to make, but I was also a very precarious child. “Precocious?” Yes — that. That is what I was. Still am too.