Chalk by Bill Thomson is a huge surprise. It is a great wordless picture book to use with students. Children go to the playground and find some sidewalk chalk. But when they draw things with it, they become real. This is fine until they draw a dinosaur. How will they get rid of it? By using the chalk of course! Great for predicting and even for having students create their own words to go with the story. The illustrations are fantastic and the story is very original.