Do you want to try a little spooky science and sensory play this fall? Our Halloween Oobleck Recipe is perfect for your young mad scientists! Halloween is a fun time of year to try out science experiments with a spooky twist. We love science and we love Halloween, so we have tons of fun Halloween activities to share with you.
HALLOWEEN THEME OOBLECK FOR SPOOKY SENSORY PLAY

HALLOWEEN THEME
Learning how to make oobleck is one of the easiest science activities you can do on a small budget with kids of all ages, and in a class setting or at home. I love how versatile our main oobleck recipe truly is and it provides a neat science lesson along with great tactile sensory play!
YOU MAY ALSO LIKE: Applesauce Oobleck and Pumpkin Oobleck
Oobleck is a classic science activity that can be themed for a number of holidays or seasons! Of course it’s easy to turn into a Halloween science experiment with a few creepy crawly spiders and a favorite theme color!
You can check out even more awesome Halloween science experiments towards the end, but I will share now that we have had a lot of fun with our bubbling brew and Halloween lava lamp this fall for some spooky science.
Looking for easy to print activities, and inexpensive problem-based challenges?
We have you covered…
—>>>FREE STEM Activities For Halloween
HALLOWEEN OOBLECK RECIPE
YOU WILL NEED:
- 2 cup cornstarch
- 1 cup water
- Food Coloring (optional)
- Halloween play accessories (optional)
- Baking Dish, Spoon
HOW TO MAKE OOBLECK
Oobleck is made with a combination of cornstarch and 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 2:1, so two cups of cornstarch and one cup of water.
1. In your bowl or baking dish, add the cornstarch. You can start mixing the oobleck in a bowl and then transfer it to a baking dish if you prefer.
2. If you want to give your oobleck a color, add food coloring to your water first.
Remember that you have a whole lot of white cornstarch so you will need a good amount of food coloring if you want a more vibrant color. We added yellow food coloring for our Halloween theme!
3. You can try mixing up your oobleck with a spoon, but I guarantee you are going to need to get your hands in there at some point during the mixing process.

THE RIGHT OOBLECK CONSISTENCY
There is a gray area for the right oobleck consistency. First, you don’t want it to be very crumbly, but you also don’t want it to be very soupy either. If you have a reluctant kiddo, hand them a spoon to start! Let them warm up to the idea of this squishy substance. Never force them to touch it though.
Oobleck is a Non-newtonian fluid which means it is neither a liquid nor a solid. You should be able to pick up a chunk of oobleck and form it into a ball before it turns back to liquid and drops back down to the bowl.
Once you have your oobleck mixed to the desired consistency, you can add your accessories as desired and play!
TIP: If it’s too soupy, add cornstarch. If it’s too hard and dry, add water. Only add in small increments till you get the desired consistency.
YOU MAY ALSO LIKE: Halloween Sensory Bins
TRY SIMPLE HALLOWEEN OOBLECK FOR SPOOKY SCIENCE THIS FALL
Click on the photo below or on the link for more awesome Halloween science experiments.
Looking for easy to print activities, and inexpensive problem-based challenges?
We have you covered…
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