1.     Put two tablespoons of corn flour into the bowl
2.     Add a table spoon of water to the flour stirring well with the spoon. Keep adding water a few drops at a time until the goo is thick and creamy.
3.     Can you feel a difference between stirring it fast and slow?
   Tap the top of the Goo quickly, does your finger sink in?
   Pick up the goo and roll it between your fingers and feel the texture. What does it feel like?

    Stop rolling - what happens?
4. Make sure you wash your hands when finished.

When you roll the goo, it feels dry and hard, like a solid.  When you stop rolling, it slowly spreads over your fingers, like a liquid.  Cornstarch particles float in water.  When you roll it, the particles are forced together and when you stop rolling, the water and cornstarch separate again.   It is a bit like quicksand.