2 cups flour
1 cup salt
1 cup water
1 tablespoon oil
1 tablespoon lemon juice
Add food colouring as desired.
The dough can be stored in the fridge for a number of days in cling wrap.
Place your creation on foil in the oven at 100 C for an hour (the lower heat helps it to not crack). Then you can take it out and heat up the oven to 180 C for another 1/2 hour to hour (it depends on how thick your dough is - so just keep checking it and turning it over).
TIP: By rubbing some water over your creation it will help the pieces stick together and it will also help the colour to stay darker.