How To Make Oobleck – It’s A Liquid AND A Solid!


Have you ever made Oobleck? It’s an unusual project but great as it is educational (sciencey) as well as being fun to make and good for sensory play ideas. Here’s How to Make Oobleck – It’s a Liquid AND a Solid!

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If you are looking for a fun easy to do science activity for your child, then how about trying Oobleck? It’s really fun to make, kids love it.


How To Make Oobleck

What is Oobleck?

Oobleck is a non-Newtonian fluid. What does that mean? That means it acts like a liquid when being poured, but acts like a solid when a force is acting on it.

You can grab it and then it will ooze out of your hands.

Oobleck gets its name from the Dr. Seuss book “Bartholomew and the Oobleck” where a green and gooey substance, Oobleck, fell from the sky and wreaked havoc in the kingdom.


  • 1 cup water
  • 1.5-2 cups cornflour (corn starch)
  • Food colouring (optional)

What To Do

  1. Put the water in a bowl and start adding the cornflour to it, stirring with a spoon to start with but you’ll need to use your hands to mix it eventually as it gets thicker and thicker.
  2. When you have added the 1.5 cups of cornflour, start adding it more slowly. You want a consistency where the Oobleck is liquid but solid at the same time.
  3. If you add too much cornflour just add some more water.
  4. When you’re happy with the consistency add a few drops of food colouring and mix with your hands.
  5. Now your child can have a good old play with it!

Things To Try With Oobleck

  • Grab a handful, squeeze it and then let it ooze out of your fingers.
  • Drag your fingers through it.
  • Roll some oobleck into a solid ball but when you stop moving it, it will melt back into liquid in your hand.
  • Jab at the Oobleck then slowly let your finger sink in.

You May Also Enjoy Simple Science Experiments For Kids To Try At Home 

Over to you now! Have you  made Oobleck? What did you think? Tell us in the comments below!

How To Make Oobleck, It's A Liquid AND A Solid!

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