Mandala
Mandalas are very intricate designs made in the shape of a circle. Buddhist monks, native Americans, and Indian Hindus have all made them through history. They represent the circle of life, how life quickly turns to death, and then rebirth. It are very simple to make a simple homemade one. All you need is a circle of paper, a thick sharpie, and a thin sharpie. Make interesting designs, anything you want. Make sure to balance the black and white space and the thick and thin lines. There is no way to mess up, so if you think you did, just keep drawing. When you think you are done, draw smaller and smaller details. Below are pictures of two of mine.