Not the Italian job kind (although I know how to make that too), but a type of burning paint that can be used to burn whatever you paint into wood, and then scrubbed away. You will be left with a piece of wood with whatever you painted charred into it. Its fun, safe (compared to my other projects), and a gives a good show when you light it.
So half the art is actually the process of making the art.
Step 1: Parts
1. Piece of wood, it will be your canvas
2. Gunpowder http://www.instructables.com/id/EEXOON4E1HEPA8KQNM/
5. Rubbing alchol
6. Pencil and Sharpie