Science Bite - Crazy Goo Slime

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:

Materials required to make crazy goo!
  • Cornflour
  • Jug of water
  • Food colouring
  • Spoon
  • Small bowl or container

    • Instructions

    Crazy Goo 1

    Step 1


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

    Crazy Goo 2
    Step 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. 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.

    Crazy Goo 3
    Step 3


    Test that your crazy goo slime is ready by hitting the surface of the goo with a spoon. 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.

    Crazy Goo 4

    Step 4


    Have fun! 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!

    Things to Try

    • Try using different colours of food colouring.

    • Experiment with different cornflour to water ratios to create the ultimate crazy goo slime.

    (N.B. This experiment also works with custard powder if you have no cornflour).