Glorious Goo

What's this Science Bite about?

You can make your own slime!

Experiment and see the effect that forces have on it when it is a liquid and a solid.

Remember - if you are trying any of these science experiments at home you will need the consent and supervision of your parent or guardian.

What you will need

Cornflour, water, food colouring, a spoon and a small bowl.

  • Cornflour (or custard powder)
  • Jug of water
  • Food colouring
  • Spoon
  • Small bowl or container

How to do this experiment

Watch the video below:

Can't see the video? View it on YouTube


  1. To the bowl or container add a few heaped spoonsful of cornflour (this will be determined by the size of your container).
    A bowl containing cornflour and some food colouring
    Then fill a jug with some cold water from the tap and to this add a few drops of food colouring.

  2. Make a well in the middle of the cornflour and add a little of the coloured water then mix in a slow circular motion.
    A bowl containing pink slime
    When the water has been mixed in, add a little more and carry on stirring slowly until you have a thick custard-like consistency. If it looks too watery just add a little more cornflour.

  3. Test that your glorious goo slime is ready by hitting the surface of the goo with a spoon.
    A hand being dipped into a bowl of pink crazy goo.
    The goo should resist any great force and should spring back like rubber. It should also behave like a liquid when stirred gently or is picked up and allowed to drip back into the bowl.

  4. Have fun!
    Rolling a ball of crazy goo between hands
    Try rolling your goo into a ball and see how long you can hold its shape for until it returns to liquid form and starts oozing through your fingers!

Find out more.

You have made a material known as a non-Newtonian fluid. Sir Issac Newton said that liquids flow at a consistent and predictable rate, our goo does not follow this rule. For this reason it is called a “Non-Newtonian Liquid” What this means is that it will become less runny the more force you apply to it. If you hit the surface hard with the spoon it seems like a solid, but if you lie the spoon on the surface it will sink like it were a liquid. The scientific name for this goo is oobleck which comes from a Dr Suess book.

Other non-Newtonian liquids are blood, ketchup and lava.

Curriculum Links

Properties and Uses of Materials

SCN 3-16a/ 4-16a


Glasgow Science Centre