How To Make Oobleck Recipe | Little Bins for Little Hands (2024)

Are you wondering how to make oobleck? Our oobleck recipe is the perfect way to explore science and a fun sensory activity all in one! Just two ingredients, cornstarch and water, and the right oobleck ratio make for tons of fun oobleck play. Oobleck is a classic science experiment that demonstrates a non-Newtonian fluid perfectly! Is it a liquid or a solid? Use our oobleck recipe to decide for yourself and learn more about the science behind this goopy substance!

Best Oobleck Recipe for Easy Science

How To Make Oobleck Recipe | Little Bins for Little Hands (1)Pin

What Is Oobleck?

Oobleck is an excellent example of a mixture! A mixture is a material of two or more substances combined to form a new material that can be separated again.It’s also a very messy sensory play activity. Combine science and sensory play in one inexpensive activity.

The ingredients for oobleck are cornstarch and water. Would your oobleck mixture be separated into cornstarch and water again? How?

Try leaving a tray of oobleck out for a few days. What happens to the oobleck? Where do you think the water has gone?

Plus, it’s non-toxic, just in case your little scientist tries to taste it! You can also combine oobleck with fun seasonal and holiday themes! Once you know how to make oobleck, you can try many fun variations. Why not…

Oobleck Recipe Variations

Make rainbow oobleck in different colors.

Create a treasure hunt oobleck for St Patrick’s Day.

Add some candy hearts to a Valentine’s Day oobleck.

Or try red hots in your oobleck for a fun swirl of color.

Earth Day oobleck is a beautiful swirl of blue and green.

Make applesauce oobleck for Fall.

Did you know you can make oobleck in a pumpkin?

What about a spooky Halloween oobleck recipe?

Or try cranberry oobleck for a STEMs-Giving!

Add peppermints for a Christmas-themed oobleck recipe.

Make a melting snowman for a winter oobleck recipe.

Is Oobleck a Solid or a Liquid?

Oobleck is a fantastic, fun, simple, and quick science lessonfor kids of all ages. Even your youngest scientist will be amazed by it. What state of matter is oobleck? Here we combine a liquid and a solid, but the mixture doesn’t become one or the other.

A solid has its own shape, whereas a liquid will take the shape of the container it is put into. Oobleck is a bit of both! Learn more about states of matter here.

Non-Newtonian Fluid

That’s why oobleck is called a non-Newtonian fluid. This means it is neither a liquid nor a solid but has properties of both! A non-newtonian fluid demonstrates variable viscosity meaning that the viscosity or thickness of the material changes when force is applied (or not applied) to it. Homemade slime is another example of this type of fluid.

You can pick up a clump of the substance like a solid and then watch it ooze back into the bowl like a liquid. Touch the surface lightly, and it will feel firm and solid. If you apply more pressure, your fingers will sink into it like a liquid.

Also, check out our Electroactive Oobleck… It’s electric!

Is Oobleck a solid?

A solid does not need a container to keep its shape like a rock.

How To Make Oobleck Recipe | Little Bins for Little Hands (2)Pin

Or is Oobleck a liquid?

A liquid takes the shape of any container or flows freely if not put in a container.

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Did you know that cornstarch is a polymer? Polymers have long chains that make them up (like the glue used in slime). When these chains get all tangled up with one another, they create more of a solid! That’s why cornstarch is often used as a thickener in recipes.

If you enjoy making oobleck, why not try making slime with our favorite slime recipes! Slime is another fantastic way to explore states of matter, chemistry, and non-Newtonian fluids!

If simple science experiments are your thing, then our Science Challenge Calendar below 👇 is a fantastic way to keep track of what you have tried and make a plan to try a new science project.

Easy Oobleck Recipe

This simple recipe is a hit to make over and over again. Make sure to watch the video. If you love our activities, find all the printable recipes in the Little Bins Club!

Oobleck Recipe Video:

Oobleck Ingredients:

  • 2 cups cornstarch or corn flour
  • 1 cup water
  • Food Coloring (optional)
  • Small Plastic Figurines or Items (optional)
  • Baking Dish, Spoon
  • Book Optional: Bartholomew and the Oobleck by Dr. Seuss

How to Make Ooobleck

How do you make oobleck? It’s easy! Oobleck is a combination of two cups of corn starch and one cup of water. You will want to keep additional cornstarch on hand if you need to thicken the mixture. Generally, the oobleck recipe is a ratio of 1:2, so one cup of water and two cups of cornstarch.

Alternatively, you can make oobleck with another starchy flour, such as arrowroot flour or potato starch. However, you may need to adjust the ratio of flour to water. It’s a perfect science experiment for preschool through elementary school!

STEP 1: In your bowl or baking dish, add the cornstarch. You will mix two parts cornstarch with one part water.

Note: Mixing the oobleck in a bowl and then transfering it to a baking dish or tray may be easier.

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STEP 2: Add the water to the cornstarch. If you want to give your oobleck a color such as green, add food coloring to your water first. If you want to add swirls of food coloring after you mix the oobleck you can also do that, see marbled oobleck here.

NOTE: Remember that you have a lot of white cornstarch, so you will need a good amount of food coloring if you want a more vibrant color.

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STEP 3: MIx! You can stir your oobleck with a spoon, but I guarantee you will need to get your hands in there at some point during the mixing process.

STORING OOBLECK: You can store your oobleck in an airtight container, but I would not use it for longer than a day or two and check for mold before using it. If it has dried out some, add a very tiny amount of water to rehydrate it, but just a very tiny bit. A little goes a long way!

DISPOSING OF OOBLECK: When you’re done enjoying your oobleck, the best option is to scrape most of the mixture into the trash. The thick substance may be too much for your sink drain to handle!

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Oobleck Ratio

There is a gray area for the right oobleck consistency. Generally, the ratio is 2 parts cornstarch to one part water. However, you don’t want it to be crumbly, but you also don’t want it too soupy.

The perfect oobleck recipe ratio is when you pick up a clump in your hand, form it into a ball of sorts, and then watch it flow back into the pan or bowl like a liquid. Luckily you can alter the consistency by adding a little more of one ingredient. Only add small amounts until you reach the desired texture.

If you have a reluctant kiddo, hand them a spoon to start. Let them warm up to the idea of this squishy substance. A potato masher is fun too. Even poking with one finger or pushing in small toys is a great way to start. You can also keep a wet papertowel to wash with nearby.

Once your oobleck is mixed to the desired consistency, you can add accessories and play like plastic animals, LEGO figs, and anything else that can be easily washed!

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Do an Oobleck Experiment

You can turn this oobleck recipe into a fun oobleck experiment. Oobleck is an easy science fair project!

How? Change the ratio of water to cornstarch, and you have a viscosity experiment. Viscosity is the physical property of fluids and how thick or thin they are, including how they flow.

What happens when you add more cornstarch? Does the oobleck become thicker or thinner? What happens when you add more water? Does it flow faster or slower?

Can You Make Oobleck Without Cornstarch?

You could even try an oobleck recipe with flour, powder, or baking soda instead of cornstarch. Compare the similarities and differences. As mentioned in the ingredients section, look for arrowroot flour and potato starch. Do the same quantities work? Does the substance have the same characteristics as the original oobleck recipe?

We tried an oobleck experiment of our own using cornstarch and glue.Find out what happened —>Oobleck Slime

Have you ever mixed cornstarch and shaving cream for Foam Dough? It’s delightfully soft and smooth.


Try An Oobleck Experiment

By introducing variables and encouraging kids to make comparisons and predictions, this oobleck experiment helps them develop scientific inquiry skills and understand basic principles of materials and their properties.

  1. Control Oobleck:
    • Start by making a standard batch of oobleck using a specific ratio of cornstarch to water. This will be the “control” oobleck for the experiment.
  2. Variable 1: Changing Ratios
    • Prepare additional batches of oobleck with different ratios of cornstarch to water. For example, make one with more cornstarch and less water and another with more and less.
    • Encourage kids to observe and compare the properties of each batch. Does changing the ratio affect the oobleck’s behavior? Is it more liquid-like or solid-like?
  3. Variable 2: Adding Objects
    • Place different objects in the oobleck (e.g., small toys, plastic shapes, coins). Observe how the oobleck interacts with these objects.
    • Ask kids to predict whether certain objects will sink or float in the oobleck. Record their predictions and compare them to the actual outcomes.
  4. Variable 3: Temperature Experiment
    • Prepare two batches of oobleck, one using cold water and another using warm water. Discuss the impact of temperature on the oobleck’s properties.
    • Observe if there are differences in how the oobleck behaves at different temperatures. Does it change its consistency or flow differently?
    • EXTRA: Try freezing oobleck!
  5. Variable 4: Time Experiment
    • Set up a timed experiment to observe changes in the oobleck over time. After applying pressure, measure how long it takes for the oobleck to revert from a solid to a liquid state.
    • Discuss the viscosity concept and how it relates to the time it takes for the oobleck to return to a liquid state.
  6. Record Observations:
    • Have kids record their observations, predictions, and conclusions in a simple scientific journal. Please encourage them to use drawings, words, and measurements.
  7. Discussion:
    • Conclude the experiment by discussing the results. Ask questions about what they observed and if their predictions were accurate. Discuss the scientific concepts behind the changes in Oobleck’s properties.

Simple Science Experiments for Kids

If your preschooler through middle schooler is looking for simpler science activities like oobleck, this home science experiment list is a great place to start!


Printable Science Projects For Kids

If you’re looking to grab all of our printable science projects in one convenient place plus exclusive worksheets and bonuses like a STEAM Project pack, our Science Project Pack is what you need! Over 300+ Pages!

  • 90+ classic science activitieswith journal pages, supply lists, set up and process, and science information.NEW! Activity-specific observation pages!
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How To Make Oobleck Recipe | Little Bins for Little Hands (16)Pin
How To Make Oobleck Recipe | Little Bins for Little Hands (2024)


How to make oobleck small amount? ›

  1. Help your child measure 3/4 cup of water in a plastic measuring cup.
  2. If you have food coloring, have your child add a couple of drops to the water.
  3. Help your child measure 1 cup of cornstarch. ...
  4. Slowly add the water and food coloring.
  5. Let your child mix the mixture.
Apr 15, 2019

What is the ratio for oobleck? ›

Making Oobleck is really easy– simply mix cornstarch and water in a bowl. Be sure to measure a 2:1 ratio of ingredients. For example, 2 cups of cornstarch and 1 cup of water.

How to dispose of oobleck? ›

Do not dispose of the oobleck in the sink! We place the oobleck mixture into plastic trash bags and carry to the dumpster. If indoors, we have found that allowing the area to air dry first makes it easier to sweep up the cornstarch. If outside and a garden hose is available, hose down the area sufficiently with water.

Is slime similar to oobleck? ›

Although many people call oobleck slime, oobleck is actually different from slime. Slime is made up of borax or sodium borate, which is a mineral and a salt of boric acid. You can find borate in liquid starch or contact solution. When mixed with glue, it creates a stretchy-like substance.

Does oobleck go bad? ›

If you keep the oobleck for more than a day, it will start to go bad and will not be able to retain the properties that it has. In order to dispose of the oobleck, all you have to do is let it dry properly by keeping it aside overnight. Then you can smash the oobleck with a spoon and throw it away easily.

Is oobleck edible? ›

Luckily, the gooey substance is not toxic, but it probably won't taste good since it's just cornstarch and water. As one individual pointed out on Yahoo Answers, while eating oobleck may not be poisonous, it could potentially give someone pains in their stomach if large quantities are ingested.

Is oobleck safe for toddlers? ›

Oobleck is a completely mesmerizing material for kids to touch and play with. Since it's just cornstarch and water (plus any color you want to add), it's super easy and inexpensive to make. It's also taste safe and non toxic, making it a great sensory play material for babies and toddlers.

How to make oobleck for preschoolers? ›

1. Mix 2 cups of cornstarch to 1 cup of water into a bowl. Mix the cornstarch and water until your oobleck is formed. Tip: If you would like to color your oobleck, add your food coloring to your water and then mix with the cornstarch.

How to make oobleck tiktok? ›

Here are the steps to make oobleck:
  1. Start with a mixing bowl.
  2. Pour in 1 cup of cornstarch.
  3. Slowly add 1/2 cup of water to the cornstarch.
  4. Stir the mixture well until it's smooth and gooey.
  5. Add another 1/2 cup of water slowly until you get the desired consistency.

Why is my oobleck watery? ›

Ideally, oobleck should flow like water when left alone, but act like a solid when pressure is applied to it. If it isn't quite to your liking, try the following: If the oobleck is too watery, add more powder. If the oobleck is too hard, add more water.

How to wash hands after oobleck? ›

Rinse your hands in a bucket of water before washing hands in the sink. Do not dispose of oobleck in a sink. Discard in a trash bag. Allow oobleck to dry on surfaces and then sweep up the corn starch powder.

Can you walk on oobleck? ›

The starch particles in the oobleck are between 5 and 20 microns wide, the researchers found. Ultimately, this explains why you can't walk on water, but can on oobleck. The viscosity, or thickness, in "normal" fluids (like water) stays constant.

How to fill a kiddie pool with oobleck? ›

Inflate the baby pool. Dump one 25 lb bag of cornstarch in the pool. Add water from an outdoor water hose to make a paste (note: Oobleck is 2 parts corstarch to 1 part water) Add second 25 lb bag and add water while the kids mix it with their hands.

How to make a small cornstarch slurry? ›

For each cup of liquid, you want to thicken, start with 1 tablespoon of cornstarch in a small bowl. Add an equal amount of cold liquid and stir until smooth paste forms. This is your slurry. Whisk the slurry into the hot, simmering liquid that you want to thicken.

How much water do I use for a teaspoon of cornstarch? ›

It will create a thicker sauce that will probably cling to the noodles better. You would make a slurry with 1 teaspoon of cornstarch about 2 tablespoons of water, then mix that in with the other ingredients.


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