Let's Make Oobleck!


Colloid Oobleck



Grade level

Any (with adult supervision)

Time duration

5 minutes


Create a simple Non- Newtonian Fluid


Learn what a Colloid and Non-Newtonian fluid are.


Corn Starch, Water, Optional: Food Coloring


A Colloid is a substance that seems like it's one thing, but is actually made of two or more things. Foods like jelly and bread dough are Colloid substances. A Non-Newtonian fluid is a fluid that changes its properties when energy is applied to it! Oobleck is a great example of both of these! Follow the directions below and make your own...


  1. In a bowl, create a mixture that is 2/3 corn starch and 1/3 water. (If you want some color in your mixture, add in a bit of food coloring to the water before mixing.)
  2. Let it sit for a few minutes.
  3. Stir the mixture with a spoon or your hand.
  4. You're finished! Your oobleck is sticky, so be sure to keep it contained to a small area, like a plate.

Try this!

Take your finger and poke it into the Oobleck. If you Poke fast, it will be act like a solid and your finger won’t enter. But if you poke the Oobleck slowly it will sink in like quicksand!

Extra Credit

Can you think of another example of a Colloid? What about another example of a Non-Newtonian fluid? I will give you a hint… it likes to hang out with jelly!

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