We love goo at Science Sparks, its wonderful to touch and play with and I am always surprised at how it can feel solid one minute and liquid the next.
Today we made a Christmassy Candy Cane version.
What you need
- Peppermint essence
- Red food colouring
I made up two batches of goo, one just normally with the cornflour and a smaller amount to which I added red food colouring, then swirled them together with a very small amount of the peppermint essence.
To make the goo, pour some cornflour into a bowl and add cold water very slowly until you get the consistency you want.
The peppermint smell was lovely and definitely made us feel a little Christmassy.
Note. Be careful with the red food colouring, it might stain clothes.
The Science Part
Did you notice that if you make a ball with the goo it is solid, but if you drop it on the floor it turns liquid again? The goo is a non – Newtonian fluid as it doesn’t flow like liquids normally do.