Oobleck is a fascinating and fun non-Newtonian fluid that behaves like both a solid and a liquid depending on the pressure applied. Named after the Dr. Seuss book Bartholomew and the Oobleck, this simple mixture of cornstarch and water is a great sensory and science experiment for kids.
It provides a hands-on way to explore scientific concepts such as viscosity, states of matter, and fluid dynamics. In this guide, we’ll walk you through the process of making Oobleck, fun activities to try, and the science behind it.
Why Make Oobleck?
Easy to Make – Requires only two simple ingredients: cornstarch and water.
Safe for Kids – Non-toxic and safe for sensory play.
Educational – Demonstrates properties of non-Newtonian fluids.
Messy Fun – Engaging, squishy, and exciting for kids of all ages.
Ingredients You’ll Need
- 2 cups cornstarch
- 1 cup water
- Food coloring (optional for added fun)
- Mixing bowl
- Spoon or hands for mixing
Step-by-Step Instructions
Measure the Ingredients
Pour 2 cups of cornstarch into a large mixing bowl.
If using food coloring, add a few drops to 1 cup of water.
Mix the Ingredients
Slowly pour the colored water into the cornstarch while stirring.
Use a spoon at first, but eventually, mixing with your hands works best.
Continue mixing until you reach the perfect consistency where Oobleck feels solid when squeezed but flows like liquid when released.
Test the Texture
Grab a handful and squeeze—Oobleck should feel solid under pressure.
Let it go—watch as it turns into a liquid and drips back into the bowl.
How to Make Oobleck with Baking Soda
For a variation of Oobleck using baking soda, follow this recipe:
Ingredients:
- 1 cup baking soda
- 1/2 cup cornstarch
- 1/2 cup water
- Food coloring (optional)
Instructions:
In a bowl, combine baking soda and cornstarch.
Slowly add water while stirring continuously.
Mix until you achieve the Oobleck texture—firm under pressure but liquid when left alone.
Add food coloring if desired and mix well.
Enjoy your new variation of Oobleck and experiment with its texture!
How to Make Oobleck with Borax
For another fun experiment, you can make a different type of Oobleck using Borax.
Ingredients:
- 1/2 teaspoon Borax powder
- 1 cup water (divided into two 1/2 cups)
- 1 cup cornstarch
- Food coloring (optional)
Instructions:
In a small cup, dissolve Borax powder into 1/2 cup of warm water.
In a separate mixing bowl, combine cornstarch and the remaining 1/2 cup of water.
Slowly add the Borax solution while stirring.
Mix well until the texture becomes thick and gooey.
Add food coloring for extra fun and experiment with how this variation differs from regular Oobleck!
Fun Activities with Oobleck
Punch It Test
Try punching the Oobleck quickly; it should feel hard.
Slowly dip your fingers in, and it will feel like liquid.
Create Oobleck Art
Add different food coloring to sections and swirl to create colorful patterns.
Oobleck Dance Experiment
Place a small speaker covered with plastic wrap under the bowl.
Play music and watch the Oobleck move in response to vibrations.
Sink or Float Experiment
Drop small objects into the Oobleck and observe how they behave.
Some objects may get stuck while others float.
How to Clean Up Oobleck
Do not pour Oobleck down the drain; it can clog pipes.
Let it dry out and dispose of it in the trash.
Wash hands and surfaces with warm, soapy water.
Final Thoughts
Making Oobleck is an exciting and educational activity for kids. It’s a perfect blend of science, creativity, and hands-on fun. Try different experiments, colors, and textures, and enjoy learning through play!
