Ooze

Cover your work area with newspapers. Put cornstarch in large bowl. Add 1-2 drops of food coloring if using. Add water slowly, mixing the cornstarch until all of the powder is wet.

Keep adding water until this mixture looks like a liquid when you stir it slowly. The ooze is just right when it won't splash out of the bowl. Tap lightly on the surface with your finger or spoon.

If it is too wet add more cornstarch, too dry, add more water. Try to pick up the resulting liquid. It feels like a solid until you open your hand and then it will slip through your fingers.