How to use: The drawing pencils are great for writing, drawing, or taking notes. Just grab a pencil and start creating. When it gets dull, use the pencil sharpener to get a sharp tip. The rubber can be used to erase any unwanted marks. The ruler is useful for measuring lengths or drawing straight lines. Just place it on the paper and draw along the edge. Care tips: Keep the set in a dry place to prevent the pencils from getting damp and the rubber from hardening. Don't drop the pencil sharpener as it may break. If the ruler gets dirty, you can wipe it with a soft, dry cloth.