You will need:
Mix the flour, salt and water until you get a uniform paste. Divide it out between three or four containers, and add a different dye to each.
Use the paste to draw on paper – you can do it with your fingers!
Place your drawing in a microwave set to 800W for 30 seconds
As the dye dries, it expands, lifts up from the paper and hardens to produce amazing spatial effects.