How to Make Slime Without Borax + Lesson Plan




About: I work at instructables by day, and turn into a stitch witch by night. follow me on instagram @jessyratfink to see what i'm working on! ^_^

I've been playing with slime recipes recently, and I have to say this is my favorite one so far! This slime is fool-proof - I've never had a batch fail on me. It's stretchy and squishy and all the things that slime should be. :D

Also, this slime is borax-free! (Great for those who are worried about using borax in something that will be touched so much with bare skin.) It's also made with two common things found in many homes: baking soda and saline contact solution!

The base of this slime recipe is Elmer's school glue (clear or regular), which is easy to find online if your local stores are out of it.

Educators, Parents and Students: check out our free Lesson Plan on Step 8!

Slime Photo Challenge and Giveaway!

Make some slime and get a giveaway pack. Visit Step 9 for full details.

Step 1: Tools + Ingredients


  • 5 oz bottle Elmer's school glue OR slightly less than 2/3 cup
  • 1 tablespoon baking soda
  • 2 teaspoons saline contact solution (needs to contain boric acid)
  • Food coloring as needed
  • Glitter if wanted

Double check that the saline contact solution you're using has boric acid as an ingredient, otherwise the recipe will not work.


  • Bowl for mixing
  • Measuring spoons
  • Spoon for mixing
  • Small air-tight container for storing - ziploc baggies are a cheap and easy way to go. (optional)

Step 2: Combine the Glue and Baking Soda

In a small bowl, stir together the glue and the baking soda. Make sure the baking soda is entirely incorporated - there should be no dry bits left. The mix will look fairly cloudy.

Step 3: Add Food Coloring

Add a couple drops of food coloring and mix. Add more as needed to reach the color you want!

Step 4: Add the Contact Solution

Add one teaspoon of contact solution and stir well. The mix will start to become really sticky - stringing from the sides of the bowl and getting stuck to the spoon.

Add the second teaspoon slowly, stirring constantly. As soon as the mix starts to pull together and come away from the sides of the bowl, you've added enough!

At this point, you should have a slightly sticky lump of slime. :D

Step 5: Knead for 2-3 Minutes

When you first remove the slime from the bowl, it will be sticky and thin. To remedy this, you've got to knead it!

Work the slime between your hands and on a clean surface - stretching and compressing it. This will help it become less sticky, softer, and also allow it to stretch properly.

Once it's nice and stretchy, you're ready to play with it!

Step 6: Tip: Easy Clean Up

The slime sticks to itself like crazy, so you can use the blob of slime to clean up your bowl and spoon. Press the slime against any bits left and they will come away cleanly. :)

Step 7: Storing the Slime

This slime can be played with multiple times as long as you store it in an air tight container! As it ages, it will lose elasticity, but it's possible to knead it and bring some of it back.

You may find that it releases a bit of liquid as it's stored - knead that back in and you'll have nice stretchy slime again in no time. If the slime snaps when stretched, kneading will help make it softer again too!

Enjoy your slime!

P.S. I'd love to see pictures if you make it! :D

Step 8: Maker Lesson Plan: the Science of Slime Investigation

Looking to mix up your science class? Slime is a great way to bring making into the classroom and explore the scientific concepts of matter and non-Newtonian fluids. Check out our latest Instructables Maker Lesson Plan: The Science of Slime Investigation!

You'll find the PDF lesson plan attached to this step. In it, you'll find a lesson plan, teacher information guide and student data sheets.

Use our Maker Lesson Plan along with the recipe for a fun slime activity!

Step 9: Enter the Slime Challenge and Giveaway!

When you post a photo of your slime on:

  • This Instructable as an "I Made It",
  • Twitter,
  • - or - Instagram,

we’ll send you an Instructables giveaway pack!

Additionally, Instructables staff will feature the best recreations of this slime recipe on our Twitter and Instagram Stories (and tag you, of course).

Here's how to participate:

  • Create your slime by following the detailed instructions in this project.
  • Post a photo of your slime to Instagram and/or Twitter, tagging @instructables and #IblesSlime. (You’ll have to follow us on each platform so we can DM you.)
  • Alternatively, post your creation as an "I Made It" at the bottom of this project.
  • Giveaway opens on March 18, 2019. We must receive submissions and iterations of this project by April 8, 2019 (11:59pm Pacific Time) to be eligible for this offering.
  • Participants will be contacted on the Instructables site via PM by the end of April 2019 to claim their giveaway pack.

124 People Made This Project!


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59 Discussions


9 days ago

Hi everyone! Thank you so much for participating in our slime challenge :D

We're compiling all the entries now - I'll comment again once we've sent out PMs so y'all can claim your prizes. <3


12 days ago

very good


Tip 13 days ago

Add terms such as viscosity and force to better student understanding. The viscosity of the fluid increases when shear stress is applied. For example: Quicksand. Flour and water. Silly putty. Great twist to an old favorite.

Screen Shot 2019-04-05 at 3.43.07 PM.png

Question 16 days ago

My daughter and her friend made slime for this challenge but I cannot post the images. Any help?

3 answers
Sock PuppetPPDB33

Answer 15 days ago

Hi. The link isn't there for "I Made It" if you're using an ad blocker. HTH

PPDB33Sock Puppet

Reply 15 days ago

Thanks for the response. I am able to follow the “I made it” link and can fill in a comment and even upload photos. However when I click “Post” I receive the error message “An unexpected error occurred”. I have tried from both mobile and desktop version of the site.
I also tried adding photos to this reply and get the same message, so maybe there is a restriction on my account? IDK? I don’t see anyone else with a problem so it must be something I’m doing...

Sock PuppetPPDB33

Reply 15 days ago

I can't think of anything more. You might try an different browser on your desktop or use a friend's machine maybe. Good luck.


16 days ago

Wow, looks really to do, I will try it!


18 days ago

how is it borax free using a solution that must contain borax?


19 days ago

Hi., Not trying to be negative but wouldn't this slime be a tad dangerous if little ones ate the stuff? Wondering if they would need to be supervised with it, or is it indeed safe?

1 reply

Reply 19 days ago

This would also be true for storebought slime. If you think your kids might try to eat it, don't let them play with it. And this isn't only an age limit. Though storebought slime might say it's intended for kids over 3 years of age, you'd still have to make your own judgement. If your kids at age 6 still puts anything in it's mouth, you may have to wonder if it's wise to let them play with these kind of "toys".

Eating toys at any ages can be hazardous...

Leah young

Question 19 days ago on Step 9

Could you please help me understand how to join this contest and post a picture


Question 19 days ago on Step 1

Hi, I'd like to try making this with my granddaughter, but I don't get Elmer's glue here in Germany and I think ordering it from the US is too expensive. Is there any other glue convenient for the recipe or can you tell me which ingredients have to be in the glue I use and which shouldn't?

1 answer

Answer 19 days ago

Any normal school glue should work


Question 19 days ago


I don't have any saline solution - is it OK to make it with boric acid for the challenge?



Tip 20 days ago

My GD uses a similar recipe all the time, but she adds a dab of shaving cream to make it smoother. This was fun to make, it does take quite a bit of kneading, but turned out very stretchy!


Question 22 days ago

I only need to post a picture of my slime on Instructables, right? I mean, I can on Instagram, but I just want to make sure I'm not missing something. :)

1 answer

4 weeks ago

wow i love slime


Question 4 weeks ago

For the challenge, do I need to use clear glue? Also, I usually use borax activator. I don't have any saline solution. Can I use my own recipe?