Derwent Watercolour Pencils
Great Watercolour pencils that offer the control of a coloured pencil and can be mixed with water to create interesting colour flows. They're not as bright as Inktense pencils and blocks so they're ideal if you like to do more subtle watercolour paintings.
The soft texture of the core makes them easy to blend and layer you can create a variety of effects by adding water, from bold images to delicate washes.
Watercolour pencils are not permanent so once the colour is dry you can re-wet it and move it about again.