Princess loves messy, sensory play, it really calms her and we have been trying to do more of it so today we made Oobleck for the first time. If you have never tried making it before like us, please please do give it a go, its great!
To make oobleck, you will need:
1-2 cups cornflour (also known as cornstarch)
1/2 cup water
Put the cornflour in a bowl and mix in the water, you can either add the food colouring to the water, or put it straight into the oobleck mixture (or a bit of both like we did as Princess kept asking for more pink!) Add more cornflour or water gradually until it feels ready.
You will know it is ready when it is liquid when you sink your hands in slowly but feels solid when you tap it quickly. Here comes the science bit...... Oobleck is known as a non-Newtonian fluids as changes pressure can change the properties of it. It feels solid when tapped quickly because the pressure forces the cornflour particles together whereas when you put your hand in slowly the particles have time to move out of the way so the oobleck behaves like a liquid.