Some substances sometimes just can't make up their mind whether they're a liquid or a solid! See what we mean with this messy experiment
Cornflour, water, a wooden spoon, a bowl.
Pour half a box of cornflour into a bowl. Then gradually pour water over and mix until it looks and feels like custard.
Run your fingers through the liquid.
Now try and punch the mixture with your fist.
Explain the water runs away first with pressure.
Try putting a fresh egg into the middle of the cornflour mxture in a zip lock bag and dropping it to see if the egg is protected.