If your kids love to make slime, they will have a blast learning how to make oobleck. You only need 2 ingredients and this fun activity also doubles as a really neat science experiment.

Oobleck in bowl with a hand dipped in it.

How to make Oobleck

We have a blast creating new things and learning how to make Oobleck did not disappoint. This fun activity only requires 2 ingredients and both kids and adults will enjoy it.

The kids were bored one day and since we already had what we needed in the cabinet, we decided to make it. The kids had so much making this and even more fun playing with it.

Making Oobleck is also a great way to have fun with the kids while also learning . If you need a fun science activity, this is such a great one to try.

What is oobleck?

Oobleck is a non-Newtonian fluid. So what does that mean? It means that oobleck has properties of both liquids and solids.

Now you know the oobleck definition. The Oobleck name originates from the book “bartholomew and the oobleck” which is a really cute Dr. Seuss book.

In the book, oobleck falls from the sky. One idea is to read the book and make oobleck for a fun activity with your children.

Is Oobleck a liquid or a solid?

It is actually both. Ok, you might be wondering how does that work? That is what makes this substance so much fun!

You can squeeze Oobleck together and form a ball and it will seem like it is a solid. However, if you stick your finger in the mixture, it feels like a liquid.

Let the kids form the Oobleck into a ball. Once they stop playing with it, it will lose its shape and turn into a liquid. 

Oobleck in bowl.

Can u eat Oobleck?

It is not poisonous as it is just cornstarch and water but it sure won’t taste good.

Can you make oobleck with flour?

No, you can’t use flour. You need a starching flour like arrowroot or cornstarch to make this.

Ingredients for oobleck: cornstarch, water, food coloring.

What materials do you need to make oobleck?

  • 2 cups of cornstarch
  • 1 cup of water
  • Food Coloring (Optional)

How to Make Oobleck: Step-by-Step Instructions:

  • First, go ahead and add food coloring to the water. Skip this step if you don’t plan to use food coloring. You can choose any color you prefer or leave it out.
Measuring cup with liquid and spoon.
  • Next, stir the water into the corn starch until the oobleck mixture is formed.
Measuring cup with ingredients ready to mix.
Measuring cup with ingredients mixed with a spoon.
  • Finally, mix it all together and that is it.
Measuring cup with ingredients mixed with spoon.

This DIY is really that simple.

The kids love playing with this and it is such a fun science experiment too. I am still so amazed at what cornstarch and water can make.

Applying pressure will make it harden into a solid but once you stop moving, it becomes a liquid. It really is so neat to play with.

The kids will have a ton of fun with this activity.

Oobleck in bowl.

How to make oobleck with baking soda:

If you choose to substitute baking soda for the cornstarch, just use 1 part room temperature water to 2 parts baking soda.

Oobleck in bowl with hand in it.

How to make oobleck with borax:

Using borax is possible but you need a few more ingredients if going this route. You will need 1 teaspoon of borax, 8 oz of glue and 4 oz of water. Note: Make sure the water is warm.

How do you make Oobleck in a Ziplock bag?

Instead of mixing everything in the measuring cup, use a ziplock bag instead. When ready to mix, seal the bag and shake until mixed.

How Long Does Oobleck Last?

It will last about 24 hours if kept inside an airtight container. I don’t recommend keeping it much longer as it can begin to mold.

Oobleck in bowl with hand in it.

Make this today!

It is the perfect activity when you want to try something fun but don’t have many ingredients and don’t feel like going to the store. You probably already have what you need in your kitchen cabinet for this fun activity.

Try these other fun diy ideas:

If your kids like to make slime, they will enjoy learning how to make oobleck. You only need 2 ingredients for this fun science experiment. You and your kids will love this easy oobleck recipe. #onecrazymom #craftideas #scienceexperiments #slimeideas

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