The document discusses optical illusions and an art project assigning students to create their own optical illusion drawings. It defines an optical illusion as something that deceives the human visual system into perceiving something that is not present or incorrectly perceiving what is present. Examples of famous optical illusions are shown, such as an image that can be seen as either an old woman or young girl. The art project assignment asks students to use different sized circles or organic shapes, some extending off the page, with an interesting background incorporating a checkered pattern, and to complete the drawing in ink.