Combine water and liquid cooking oil in a bowl.

Add food coloring to the water and oil mixture.

In a separate bowl, combine flour and salt.

Pour the colored water mixture into the flour and salt mixture.

Mix all ingredients together until a dough forms.

Knead the dough until it reaches a consistency similar to biscuit or pie dough.

If the clay is too sticky, add a little more flour.

If the clay is too dry, add a little more water.

When not in use, store the play clay in a plastic bag or sealed container in the refrigerator.