Galaxy Slime: How to Make Sparkly Space Slime at Home (2025)

Looking for a fun, hands-on activity that’s out of this world? This DIY galaxy slime is sparkly, stretchy, and absolutely packed with cosmic colour! With shimmering stars, deep space shades, and a satisfying squish, it’s the perfect mix of craft and sensory play.

Whether you’re making it for a rainy day activity, a party favour, or just for fun, this galaxy slime recipe is sure to be a hit. With shimmering glitter and metallic paint, you’ll create swirls of colour that look like they come straight from outer space. It’s a hands-on way to explore, spark curiosity, and bring a little cosmic magic right to your kitchen table!

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Helpful Tips:

1. Don’t worry if your slime feels sticky at first! That’s totally normal. As you knead and stretch it with your hands, it’ll become soft, smooth, and oh-so-satisfying to squish.

2. Here’s a cool slime trick: it’s self-cleaning! If the galaxy slime is sticking to your fingers while mixing, just grab a ball of slime and dab it against the sticky bits. The slime lifts right off your hands, leaving you mess-free and ready to play!

What type of glue is best for making galaxy slime?

For rich, deep galaxy colours, we recommend using clear glue. Clear glue keeps the paint colours bold and vibrant, while white glue tends to turn them more pastel.

Plus, clear glue gives your slime a gorgeous glossy shine and a soft texture that’s extra stretchy and fun to play with!

Our favourite glue choice? Elmer’s clear glue! It consistently makes the stretchiest slime. We also tested this recipe with Craft Smart glue from Michaels, which definitely worked, but the texture was firmer and a bit more rubbery.

That said, white school glue works in a pinch. It still makes great slime, just with a slightly different look.

How can I colour my galaxy slime?

Acrylic paint gives the richest, darkest colours, especially if you use metallic paint. It adds a shimmery dimension that’s perfect for a cosmic look.

To really make your slime sparkle like the stars, add fine silver glitter. It’s the perfect finishing touch and brings that magical galaxy vibe to life.

If you want even more sparkle, sprinkle star-shaped glitter or confetti on top while you play. It looks beautiful and adds a satisfying crunch! We recommend adding it on top, not mixing it in — otherwise, it tends to disappear inside the slime.

You can also try mica powder for a pearlescent gleam. It makes your slime look silky and almost holographic! For the best results, combine paint and mica powder to get both deep colour and beautiful shimmer.

Will the galaxy slime keep its swirls?

Galaxy slime looks amazing when you first swirl it together, but eventually the colours will blend into grey or black as you play with it. That’s just part of the fun!

To make those magical swirls last a little longer, divide each colour into multiple sections (4 to 6 each) before combining them. That way, you’ll get more chances to recreate those dreamy galaxy effects. This will also allow multiple kids to each have their own ball of space slime!

Even after the colours mix, you’ll still see sparkles and shimmery streaks throughout the slime. And most importantly, it stays stretchy, squishy, and endlessly fun to play with!

Galaxy slime is such a fun way to combine art, science, and sensory play — all with a sparkly, cosmic twist! Whether you’re crafting with kids, exploring colours and textures, or just enjoying the simple joy of stretchy slime, this DIY project is always a blast. The vibrant swirls, glittering stars, and rich colours make it just as beautiful as it is fun to play with!

Here’s even more fun slime recipes:

Glow in the Dark Slime

Mermaid Slime

Cloud Slime

Where to buy:

You can purchase Low-Mess Crafts for Kids from Amazon, or wherever books are sold:

Amazon | Barnes and Noble | Books-A-Million | Indiebound | Amazon Canada