Crayons can be all sorts of different colours, not just orange and purple. Do you know what they're made of? Martin: Are they made of wax? Curious Cat: Yes, that's right. And wax is made from oil ...

Coloring the edges of vinyl wallpaper is less likely to work because the wax in crayons won't stick to the plastic, especially if you're attempting to clean walls with a liquid solution.

You will need your sketchbook and well… anything you like, really. Today I'm going to use wax crayons, acrylic paints, and strips of paper. First I've sketched out a beach picture, so I know ...