How to Make Oobleck – It’s a Liquid AND a Solid!

erin mcerlean

Erin Perkins McErlean

March 6, 2019


Like this? Share it with your network!

Like this? Share it with your network!

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!

Don’t miss our best content straight to your inbox! Sign up now and get our FREE newsletters packed with fun ideas and things to do with the kids, family-friendly recipes, expert advice, parenting tips and great competitions.

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!

Like this? Share it with your network!

Like this? Share it with your network!

Published On: March 6th, 2019 / Categories: Things To Do / Last Updated: April 3rd, 2021 / Tags: , , , , , /

About the Author: Erin Perkins McErlean

Originally from Portland, Oregon, Erin has been living in Co Clare since 2007. She loves to travel to off beat places with husband, Donal, and two kids Eloise (10) and Abe (9).

Related Posts

You May Also Enjoy

Have Your Say

Have Your Say

Join the conversation today and tell us what you think.