How to Prepare Oobleck

How to Prepare Oobleck

Oobleck is a super cool substance that is categorized as non-newtonian as it isn’t quite a solid and isn’t quite a liquid. As pressure is applied to the Oobleck substance, it feels as if it’s solid. As soon as that pressure is removed, the substance feels liquid and appears liquid. How cool is that?! I remember making Oobleck when I was in school. Want to try is for yourself? Read on! I bet you’ll have a hard time taking your hands out of the bin like I did!


  • Corn Starch
  • Water
  • Bin
  • Liquid watercolour (optional)
  • Items to play with in bin (optional)


1- Add 1 cup of water to bin.

2- Add 1.5 cups of corn starch to bin.

How to prepare Oobleck- Sensory Bin Prep- Add water and corn starch

3- (Optional) Add drops of colour. This step could also be done after step 4.

How to prepare Oobleck- Sensory Bin Prep- Add liquid watercolour

4- Mix. You can begin mixing with a spoon but you’ll quickly want to switch to your hands. You want a consistency that is not quite solid and not quite liquid. If it’s too solid- add more water. If it’s too liquid and solidity does not begin to form when pressure is applied- add more corn starch. The great thing about Oobleck is that you really can’t screw it up!

How to prepare Oobleck- Sensory Bin Prep- Get those hands in there!

5- Oobleck is ready to use! Best when played with with bare hands and anything else you’d like to add. I used black liquid watercolour for colour and glow in the dark stars as a space themed Oobleck sensory bin. Drag is across the bin, squeeze it, and try and pick it up. Open your hand and see what happens!


This can be reused. You will need to really mix again as it hardens at the bottom when it settles and the liquid floats to the top.



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