They may be usually waxedbased and may be either soft or hard depending on the make. Wax established crayons are also available in most art and craft shops. These are much less streaky and tend to mix but they're not vital for the coloring in experience. You can even get water soluble pencils that work like water color paints. You will get some great effects by combining the colors or smudging them with your finger.

As these are <a href="http://de.pons.com/