July Moment of Science:

Oh Oobleck!

Bartholomew and the oobleckOobleck is a fun science experiment that involves a substance often referred to as a Non-Newtonian Fluid. When Oobleck is being poured, it acts like a liquid, but it acts like a solid when pressure is applied. Can you think of any other substances that you think might be a Non-Newtonian Fluid? Oh, the science! Oobleck gets its name from the Dr. Seuss book Bartholomew and the Oobleck where a gooey green substance, Oobleck, falls from the sky and wreaks havoc in the kingdom.

We recommend reading the book with your children first, however if you want to do the experiment today, you can listen to the story here. Now it’s time to make your own Oobleck!

First, gather your materials:
2 Cups Cornstarch
1 Cup Water
Food Coloring (can be any color you’d like – please note food coloring may leave color behind on hands, feet, clothes, etc.)


  1. OobleckPour cornstarch into a medium sized bowl.
  2. Slowly add water and stir. (Note: you may not need all of the water, pour slowly and test as needed.)
  3. Pour in drops of food coloring and mix in.

Once made, there are several things you can do with the Oobleck. If you hit the liquid, it will feel like a wall, but if you touch it gently it will flow like a liquid (Oobleck may splatter a bit, but will wash off with some water). After some experimenting, try having your children create a boat of materials found around the house that won’t sink in the Oobleck. Does weight, size, or shape seem to make an object float or sink? Share photos of your experiment with us on social media by tagging @discoverycubeOC and @discoverycubela.

To purchase the book online visit http://www.amazon.com/Bartholomew-Oobleck-Caldecott-Honor-Classic/dp/0394800753.