Your image should be simple enough to be easily repeatable, but not so simple that you don't have any store line. A map of North America might be a little too complex, for example. A drawing of an egg, on the other hand, doesn't give you much to work with. You may want to start with an existing image a photo, a picture, a drawing or an illustration and work at simplifying and abstracting that image. Add and substract details. Select an image that your audience will recognize. If they are going to be able to share in the surprise at the end, they need to know what the image is. Remember that the symmetrical images and images with repetitive elements will be harder to make a story around. If you decide to finish with a picture of a centipede, you are going to have to thing of fifty different things that the legs can represent in your story.
Draw simple abstract figures, different kinds of lines and geometric shapes. Work together to brainstorm a list of things each shape could be. Foer example, a circle might be a button, a coin, a small lake, a bowl, a cookie, a fingerprint, the path made by someone walking in a circle, a wheet, the sun, the moon, a planet, a sign or an eye. Turn the image and repeat the process. A tall, thin triangle that suggested pine tree or mountain might look more like an icicle, a pennant oe an ice cream cone when you turnit the other way.
