500g of plain flour
250g of salt
250ml of water (add more if needed)
Mix together all the ingredients in a bowl until the mixture is well joined and has the consistency of clay.
Roll out into a large oval. Make sure your dough doesn't become too thin or it will be very fragile when it has dried.
Firmly press your hands into the dough. Make sure you leave a clear indentation.
Bake in the oven for 3-4 hours on the very lowest heat or leave to dry in a warm room for a few days.
Once dry, paint in your favourite colours and add your names and a date.