Put 2 cups of plain flour into a bowl.
Add 4 tablespoons of cream of tartar.
Add 1 cup of salt to the bowl.
Pour in 2 tablespoons of cooking oil.
Add a few drops of food colouring.
Measure 2 cups of water and pour all the ingredients into a saucepan.
Mix it all together on a medium heat.
Keep stirring for 3 -5 minutes until it thickens.
Wait for your playdough to cool then store it in a plastic container.