How to make slime using Cornstarch

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Having a child with sensitive skin makes it hard to make traditional slime. Since making slime is something that all my kids love to do, I wanted to find a way that everyone could have fun since Borax can aggravate some people’s skin, especially among children. This cornstarch slime recipe, also known as “Oobleck” does the trick for us every time and works great for sensitive skin!

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oobleck

Our Family Cornstarch Slime Recipe

Ingredients:
1 Cup Cornstarch
1/2 Cup Water
1 Bowl
1 resealable bag
Glitter for color (optional)
Directions:
Pour Cornstarch into a bowl. Add water slowly while mixing the ingredients with your hands. Add color (optional). Transfer slime in a resealable bag. Store slime in the refrigerator. You may need to mix it each time before using.
*Also remember that you cannot dump slime down the drain because it can clog your drain.

oobleck

 

Tips and a Variation

When you add your water, you want to really make sure you add the water slowly. While the recipe is a guide, sometimes things interact differently. Being patient and taking it slow will give you a better cornstarch slime or oobleck.

If you want a thicker cornstarch slime, instead of using water, use regular old white glue. Add glitter if you desire and then add your cornstarch gradually. You will want twice as much cornstarch as glue. If you use less, it will be more runny. If you use more, it may be a little too thick.

In the end, you may have to experiment with it a bit to get the consistency you want. Consider it a fun science experience!

Authors note: I hope that you found this tutorial helpful. This has been one of my most popular posts of all time. I posted this before pictures on blogs were really that big of a deal and will update the pictures at some point. I have had some people love it and others hate it. The most important thing is to have fun with it!

cornstarch slime oobleck

 

 

 

30 comments

  1. This is a great recipe – I had never made slime before as my recipe calls for Borax as well and it just never seemed mild enough for us. Thanks so much for sharing!

    1. Nonnewtonian. A newtonian fluid has a constant viscosity while a nonnewtonian fluid changes viscosity depending on the force applied to it.

  2. My son has very sensitive skin and he is allergic to an ingredient in borox. This recipe is better than any other and it does not irrtate his skin. Thanks!!! 🙂

  3. When I followed the instructions it disolved and looked like milk so I put it in the fridge will it turn into slime then or is it good now

  4. It may not all have the same consistency. I haven’t made this in a while because the older kids are too cool now…or so they think. It did work well for us when they younger because my daughter could not use a lot of the other recipes because of her skin allergy

  5. Great job!! You made a lot of people happy, thanks. Every time I made slime, it would never work or I would run out of an ingredient by making too much slime. (Lol) Thus is wonderful

  6. I’m amazed I never made slime before for my nieces and nephews, but that is probably I didn’t have borax – good to know it can be harsh, and that you don’t need it! This slime is so cool, and easy, too!

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