Watercolour pencils are coloured pencils that are water soluble. Their versatility means you can use a single pencil with many different techniques.
Use watercolour pencils dry Use watercolour pencils with a brush
Use watercolour pencils on wet paper
Dip a watercolour pencil in water
Use watercolour pencils as a substitute for watercolour paints
Watercolour pencils are a good medium for beginners
Watercolour pencils can be combined with other media
Use watercolour pencils to add details to a watercolour painting
Any combination of all of the above!