Learn how to make Oobleck with just 2 simple kitchen ingredients! This classic Oobleck recipe is a fun hands-on science activity that feels like both a solid and a liquid at the same time. Kids love exploring this strange cornstarch-and-water mixture through sensory play and simple kitchen science.
Oobleck is quick to make, inexpensive, and perfect for preschoolers through elementary-aged kids.
👉 Looking for more easy science activities? Visit our Kitchen Chemistry Experiments for Kids collection.
What Is Oobleck?
Oobleck is a simple mixture made from cornstarch and water. It is known as a non-Newtonian fluid because it behaves like both a liquid and a solid.
When you slowly move your hands through oobleck, it flows like a liquid. But when you squeeze it or hit it quickly, it suddenly feels solid.
This unusual behavior makes oobleck one of the most popular kitchen science activities for kids.
👉 Want to learn more about the science behind it? Check out our Non-Newtonian Fluid Experiment for Kids post.
Oobleck Ingredients
You only need 2 ingredients to make homemade oobleck.
- 2 cups cornstarch
- 1 cup water
Optional:
- food coloring
- small toys for sensory play
- measuring cups and spoons
💡 TIP: Add the water slowly until the mixture feels thick but still flows when lifted.
How to Make Oobleck
STEP 1: Add the cornstarch to a bowl.
STEP 2: Slowly stir in the water. Mix slowly until combined. Using your hands often works best.
STEP 3: Adjust the consistency if needed.
- Add a little extra water if the mixture is too dry.
- Add more cornstarch if it becomes too runny.
💡 The perfect oobleck should feel solid when squeezed but melt back into the bowl when released.
Oobleck Science
Oobleck is a non-Newtonian fluid. Unlike water, its viscosity changes when force is applied.
- When pressure is added quickly, the cornstarch particles push together and act more like a solid.
- When moved slowly, the particles slide past each other like a liquid.
This makes oobleck a fun way to explore:
- states of matter
- viscosity
- mixtures
- physical properties
- kitchen chemistry
👉 You can also explore more States of Matter Activities for Kids with simple hands-on experiments.
Is Oobleck a Solid or a Liquid?
Oobleck behaves like both.
It can pour and drip like a liquid, but it also becomes firm under pressure. That is why it is called a non-Newtonian fluid.
Grab the Free Printable Oobleck Activity
Ready to try this easy kitchen science experiment?
Grab the free printable Oobleck Activity that includes:
- step-by-step instructions
- simple science information
- observation questions
Perfect for home, classroom, or homeschool science fun!
👉 GET THE FREE OOBLECK PRINTABLE
Oobleck Recipe FAQ
What is the best ratio for oobleck?
A good starting ratio is 2 parts cornstarch to 1 part water. You can adjust the mixture slightly depending on the consistency you want.
How do you store oobleck?
Store oobleck in a loosely covered container for up to 24 hours. Stir it again before using if separation occurs.
Can you freeze oobleck?
Yes! Frozen oobleck creates a fun sensory science activity and can be used for simple excavation experiments.
How do you clean up oobleck?
Allow the mixture to dry slightly before cleaning. Scrape excess oobleck into the trash and wipe surfaces with warm soapy water.
Why is my oobleck too runny?
If your oobleck feels too watery, add more cornstarch a little at a time until the mixture becomes thick but still flows slowly.
Fun Oobleck Variations
Try fun themed versions of this easy Oobleck recipe!
More Easy Kitchen Science Activities
If you enjoyed making oobleck, try these fun science activities next:
- Magic Milk Experiment
- Homemade Slime
- Density Tower
- Baking Soda and Vinegar Balloon
- Floating Egg Experiment
Find more simple science ideas in our Kitchen Chemistry Activities for Kids hub.
Explore More Kitchen Chemistry
Continue the fun with our Kitchen Chemistry Pack featuring printable experiments, reusable investigation pages, science explanations, and easy hands-on activities using everyday kitchen supplies.
Perfect for home or classroom science with activities focused on:
reactions, mixtures, crystals, surface tension, polymers, and color-changing chemistry.
Love this amazing oobleck recipe. Look so delicious and yummy. Thank you for sharing it.