This is an interesting little drawing/imagination game you can play with the kids, to pass the time, or to warm up your creative juices. Start with a piece of paper and a pencil, (or light coloured marker or pencil crayon). Scribble randomly all over your paper so that you have something vaguely like this:
Now look at it. View it from different angles. Your mind will begin to find familiar shapes, just like cloud gazing. You might see an eye, a fish, martians, etc...
Using a pen (or dark marker or pencil crayon) trace the lines that form whatever you see. Maybe add some extra detail. Just relax and have some fun with it.
This can work well if you are having a creative mental block. the image below is one that came about entirely through this process. I needed to draw a little devil character for a t-shirt design but was having difficulty coming up with anything original. I played the scribble game and without trying to or expecting it suddenly saw what I had been looking for.