|A graphic tablet is pretty cheap and makes it much easier to draw lines than when using a mouse.|
- Open the photo in Photoshop
- Add another layer over it - this is where you will draw.
- Use the pencil tool to trace around the main features.
- Make sure that all the lines join up or go off the page otherwise your "paint" will bleed.
- Use the paint bucket tool to colour in each shape.
- Make another layer and add labels with the text tool.