Jelly cube slime is one of the coolest, most satisfying slimes to make and play with! It’s stretchy, glossy, and filled with soft sponge cubes that you can squish, press, and even pop as you go. The added texture makes it extra fun for sensory play, and it’s a favourite among kids, tweens, teens, and anyone who loves ASMR crafts.
There’s just something about this slime that’s completely irresistible — it’s the kind of recipe you’ll find yourself making again and again. Whether you’re mixing it up for a slime party, a rainy day activity, or just because it looks awesome, jelly cube slime is the kind of DIY fun that never gets old!
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How to Make Jelly Cube Slime
Materials:
- Clear glue
- Baking soda
- Food colouring
- Contact lens solution
- Melamine sponge (1/4 of one, cut into small cubes)
Watch the step-by-step video tutorial:
Instructions:
Step 1: Find what you need
- Gather your supplies and materials.
Step 2: Cut up the “jelly cubes”
- To make the cubes in jelly cube slime you’ll need a melamine sponge.
- Cut 1/4 of the sponge into small cubes, about 1cm square. Set aside for now.The other 3/4 of the sponge can be used for cleaning or future batches of slime.
Step 3: Mix the first ingredients
- Add 1/2 cup clear glue to a small bowl.
- Pour in 1-1/2 teaspoons of baking soda.
- Stir well, until combined.
- Add 4 drops of food colouring in the colour of your choice. (We chose pink.) Stir to combine.
Step 4: Activate the slime
- To activate the slime add 2-1/4 teaspoons of contact lens solution.
- Stir until the slime thickens and pulls away from the side of the bowl.
- Pick up the slime and stretch it, kneading it and squishing it. It’ll be sticky at first, but just keep going.You can add a few more drops of contact solution if it’s really sticky, but you don’t want it to be overactivated. A bit of stickiness at this point is okay.
Step 5: Add the cubes and let sit
- Add the foam cubes into the slime.
- Fold them into the slime, mixing it with your hands.
- Then place the slime in an airtight container and let it sit overnight.
- Your jelly cube slime is complete!
Helpful Tips:
- Try different sizes of sponge cubes to see which texture you like best. Smaller cubes give a subtle squish, while bigger ones make the slime feel extra chunky.
- Don’t overdo it on the cubes! Too many can absorb your slime overnight and make the texture feel rubbery/stiff the next day.
What type of sponge do I need to make jelly cubes for slime?
We recommend using melamine sponges (like Magic Erasers) because they have a smooth, satisfying texture and soak up slime really well. You can buy a generic brand at the dollar store or online for much less money than the name brand sponges.
A regular kitchen sponge will work in a pinch, but it may feel coarser and won’t give the same smooth squish.
What slime activator works best for jelly cube slime?
We like using contact lens solution and baking soda. It’s easy, safe, and gives a great stretchy consistency. Just be sure your contact solution contains boric acid and sodium borate to activate the slime.
You can also use borax powder dissolved in water (about 1 teaspoon borax per 1 cup of warm water). If you go this route, you don’t need to add baking soda.
How do you store jelly cube slime?
Store your slime in an airtight container or zip-top bag to keep it from drying out.
How long does jelly cube slime last?
If you store your DIY jelly cube slime in an airtight container and play with clean hands, it should last for at least a few weeks.
Over time, the texture of the slime may change slightly. As the slime gets absorbed into the sponge cubes it can become a bit more rubbery. However, the longer the slime sits the more the cubes will pop!
If needed, you can refresh the slime by kneading in a little more clear glue or adding a splash of water. If the jelly cube slime starts to smell or change in appearance, throw out the slime and make a fresh batch.
Jelly cube slime is such a fun twist on classic slime — and once you try it, you’ll see why it’s a favourite! The combination of glossy stretch and sponge-filled texture makes it incredibly satisfying to play with, whether you’re squishing the cubes, poking the surface, or just watching it ooze between your fingers.
It’s a great sensory activity for kids, tweens, and teens, and a fun way to get creative with just a few simple ingredients.
Here’s even more slime recipe ideas:
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Where to buy:
You can purchase Low-Mess Crafts for Kids from Amazon, or wherever books are sold:
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