2 cup plain (all-purpose) flour
1 cup salt
3 tablespoons cream of tartar
3 tablespoons vegetable oil
2 cups water with food colouring or ink added
1 teaspoon vanilla essence (optional but it makes the play dough smell nice!)
Put all the ingredients into a large saucepan, and stir over a medium heat until the dough forms into a ball. Allow to cool, and then knead until smooth.Store in an airtight container (a Ziploc bag with the air squeezed out).
The Inkjet ink binds well with the dough, and won't stain your hands.