Wind and Mr. Ug -
This is a lovely story about a triangle named Wind who lives on a unique world called Flatland. She loves going for walks, and one day becomes friends with a mysterious being called "Mr. Ug".
Though on Flatland everything is one-dimensional and straight-forward, things are not what they seem...
Vi Hart walks you through some of the marvels of a one-dimensional plane with a simple and charming narrative.