PJ Staley. Is there any way to change to colour of the drawing, to say for example, give the effect of using a coloured pencil?

Here are some useful actions for creating pencil drawing sketch effects in Photoshop in under a minute. Farm animals:

Duplicate this modified layer. Follow the steps below which uses layers, image desauration, layer modes and a guassian blur to change a photo into a pencil sketch. Great for your headers, posters, advertisments - any web or print projects.