Making slime at home is one of the most popular kids' activities — and for good reason. It's part science experiment, part sensory play, and kids never get tired of it. Whether your kid is asking to make slime for the 10th time or you've never tried it, this guide has everything you need to make foolproof slime at home — no borax required.
Classic Slime
What You Need
- ½ cup white school glue (PVA glue)
- ½ teaspoon baking soda
- 2–3 tablespoons saline solution (contact lens solution)
- Food coloring (optional)
How to Make It
- Mix the glue. Pour the entire ½ cup of white school glue into a mixing bowl. Add a few drops of food coloring if you want a specific color and stir until it's evenly distributed.
- Add the baking soda. Sprinkle in ½ teaspoon of baking soda and mix well. The baking soda helps the slime thicken and gives it that perfect stretchy texture.
- Add the saline solution. Start with 2 tablespoons of saline solution and stir. The slime will start to come together and pull away from the sides of the bowl. If it's still too sticky, add more solution ½ tablespoon at a time.
- Knead it. Take the slime out of the bowl and knead it with clean hands for 1–2 minutes. The more you knead, the smoother and stretchier it gets.
Pro Tips
- If the slime is too sticky, add a few more drops of saline solution to your hands while kneading.
- If it's too stiff, knead in a tiny drop of lotion or body oil.
- Store in an airtight container or zip-lock bag — it lasts up to a week.
Fluffy Slime
What You Need
- ½ cup white school glue
- 3 heaping tablespoons shaving cream (not gel)
- ½ tablespoon baking soda
- 1 tablespoon saline solution
- Food coloring (optional)
How to Make It
- Combine glue and shaving cream. Pour the glue into a bowl and add the shaving cream. Mix until fully combined — the mixture will be light and airy.
- Add color. Add a few drops of food coloring if desired and mix until the color is even.
- Add baking soda. Sprinkle in the baking soda and stir well.
- Activate with saline. Add the saline solution and stir. The mixture will start to thicken quickly.
- Knead until fluffy. Knead the slime for 2–3 minutes until it reaches a soft, cloud-like consistency. It should be stretchy but not sticky.
Pro Tips
- The shaving cream is what makes it fluffy — don't substitute with gel.
- Fluffy slime is softer than regular slime and is great for kids who don't like sticky textures.
- This slime is best played with the same day — it tends to flatten over time.
Glitter Slime
What You Need
- ½ cup white or clear school glue
- ½ teaspoon baking soda
- 2 tablespoons saline solution
- 2 tablespoons fine glitter (or a mix of colors)
- Food coloring (optional)
How to Make It
- Make base slime. Mix the glue, baking soda, and saline solution as you would for Classic Slime (steps 1–4 above). Clear glue gives the glitter more shine, but white works too.
- Add the glitter. Once you've kneaded the slime to the right consistency, flatten it out and sprinkle your glitter on top. Fold the slime over the glitter and knead until the glitter is evenly distributed.
- Add extra sparkle. For extra bling, add a second layer of fine glitter or iridescent glitter and knead again.
Pro Tips
- Clear glue + fine white glitter = the most sparkly result.
- Chunky glitter shows up better in white slime.
- Expect glitter to get everywhere — that's half the fun!
Galaxy Slime
What You Need
- ½ cup dark blue or clear school glue + black food coloring
- ½ teaspoon baking soda
- 2 tablespoons saline solution
- Purple, pink, and silver glitter
- Glow-in-the-dark powder (optional)
- Small star or planet confetti
How to Make It
- Color the glue. Mix your glue with black food coloring until it's a deep space-black or dark purple. The darker the base, the better the galaxy effect.
- Make the slime. Add baking soda and saline solution as usual, and knead until smooth and stretchy.
- Layer the glitter. Lay the slime flat and sprinkle purple glitter on one half, pink on another, and silver in the middle. Fold and knead until the colors swirl together like a galaxy.
- Add the stars. Fold in small star confetti or planet-shaped beads for extra cosmic effect.
- Make it glow. If using glow-in-the-dark powder, knead it in last. Charge the slime under a bright light for a few minutes, then turn off the lights to see it glow!
Pro Tips
- Don't over-knead — you want visible swirls of color, not one solid shade.
- Glow-in-the-dark powder works best when the slime is in a dark room for 30+ seconds.
- This is the most popular slime at Cosmic Slime parties!
🛡️ Slime Safety Tips for Kids
Always Supervise
Grown-up supervision is required, especially for kids under 8. Make sure they don't put slime or ingredients in their mouths.
Wash Hands After
Have kids wash their hands thoroughly after playing with slime. Don't let them touch their eyes or eat while making slime.
Check for Sensitivities
If your child has sensitive skin, have them wear disposable gloves. Discontinue use if redness or irritation occurs.
Store Properly
Keep slime in airtight containers when not playing. If it gets gritty or dried out, it's time to make a fresh batch.
Want to Skip the Mess?
Making slime at home is fun — but a Cosmic Slime party means every kid makes their own custom slime to take home, with zero cleanup for you. We bring everything. We handle everything. Kids go cosmic.
Book Your Slime Party →