Strange Little Mini Excercises

In this world, there are a lot of teachers. Some of those are called 'creative writing teachers' . 

These teachers generally tell their classes to do strange little assignments that apparently (to the eye of the student) have no meaning, and are astonishingly hard to start or finish (oftentimes most people are sitting staring blankly a a piece of paper). 

So I have decided that I will find some samples of these little mini exercises and do them, just to see.