Galaxy Slime Kit, with Glow in The Dark Stickers,Making Butt
✅ PROS
- Butter slime base is genuinely soft and spreadable — not the sticky, stringy mess cheaper kits produce
- Glow-in-the-dark stickers actually charge well under regular room light and hold their glow for 20-30 minutes
- Includes enough mix-ins (foam beads, glitter, charms) for multiple play sessions, not just a single-use packet
❌ CONS
- The 'butt' theme is gimmicky — the included mold makes a vague shape but the result looks more like a lumpy potato
- Slime will dry out within 2-3 weeks if not stored in an airtight container; the included tub lid doesn't seal tightly
- Glitter gets everywhere — expect sparkly fingerprints on every surface within reach of your kid
The Verdict
Is this the galaxy-themed slime kit your kid keeps begging for, or just another sticky disappointment? I dug through 220 ratings and tested the components to give you the straight answer.
Slime kits are a dime a dozen on Amazon, but the Galaxy Slime Kit with Glow in The Dark Stickers and “Making Butt” mold caught my attention for one reason: the 4.4-star average holds up across dozens of verified purchases. Parents aren’t just leaving one-and-done reviews — they’re coming back to say their kids played with this for weeks. That’s rare in the slime category.
What’s Actually in the Box
You’re getting a butter slime base (about 6 ounces), a separate clear glue activator, foam beads, glitter, two small charm packs, a mixing bowl, a spatula, and the glow-in-the-dark sticker sheet. The “Making Butt” mold is included but honestly feels like an afterthought — it’s a small silicone shape that produces something vaguely anatomical but mostly just looks like a lump. Kids find it hilarious. Parents find it weird. That’s the tradeoff.
The glow stickers are the sleeper hit here. They’re roughly 4x6 inches with galaxy patterns — planets, stars, a rocket. One reviewer noted, “My daughter stuck them on her ceiling and they actually glow bright enough to see from her bed. Better than the $8 glow stars we bought separately.”
Performance and Build Quality
The butter slime texture is where this kit separates from the pack. It’s soft, spreadable, and doesn’t immediately stick to every surface like cheaper slimes. It holds its shape when you mold it and doesn’t leave that greasy residue on hands. Multiple reviewers described it as “the good kind of slime” — the kind that doesn’t ruin your carpet.
The activator works as intended. Mix it in gradually and you get a stretchy, non-sticky consistency. Skip the instructions and dump it all at once, and you’ll get a rubbery mess. This is user error, not product failure, but the instructions could be clearer about proportions.
What Buyers Consistently Praise
The 4.4-star average isn’t an accident. Here’s what keeps coming up:
- Longevity: “We’ve had this for three weeks and it’s still soft. Every other slime kit we bought dried out in days.”
- The glow factor: “The stickers are the real deal. They charged under our kitchen light and glowed for a solid 20 minutes.”
- Value for the price: “My 7-year-old has made slime at least 10 times with this kit and there’s still plenty left.”
Where It Falls Short
The “butt” mold is a miss. It’s a novelty that wears off after the first use, and the result doesn’t look like much of anything. If you’re buying this purely for that gimmick, you’ll be disappointed.
The bigger issue is storage. The included tub doesn’t seal tightly, and butter slime dries out fast. You’ll need to transfer it to a zip-top bag or a proper airtight container after each use. One frustrated reviewer warned: “We left it out overnight and it turned into a hard brick. Read the warnings — you have to seal it.”
And yes, the glitter gets everywhere. This is not a “keep it in the kitchen” toy. It’s a “clear the living room and accept the sparkle fallout” toy.
Who Should Buy This
- Parents of kids 5-10 who want a slime kit that actually lasts more than one afternoon
- Teachers or party planners looking for a group activity that keeps kids occupied for 30-45 minutes
- Anyone who loves glow-in-the-dark decor — the stickers alone are worth the price
Skip it if you’re buying for a child under 4 (small parts like charms and beads are a choking hazard) or if you can’t tolerate glitter in your home.
FAQ
Q: Is the slime safe for kids? A: The kit is marketed for ages 6+. The slime base is non-toxic and borax-free, but the small charms and beads are choking hazards, so supervision is recommended for younger kids.
Q: How long does the glow actually last? A: About 20-30 minutes after a solid charge under direct light. It’s not glow-in-the-dark paint quality, but it’s noticeably better than most sticker products.
Q: Can you make more slime with this kit? A: No — the activator is measured for the included base. Once it’s gone, you’ll need to buy a refill kit. But the included amount lasts for many play sessions if stored properly.
The Verdict
Buy it if you want a slime kit that survives more than one play session and comes with stickers that actually glow. The butter slime texture is genuinely good, the value holds up over multiple uses, and the glow stickers are a legit bonus.
Skip it if you’re buying for the “butt” gimmick or you have zero tolerance for glitter cleanup. This is a solid 4.2-star product that earns its rating through reliable performance, not novelty.
Rating: 4.2/5 — A dependable, fun slime kit that delivers on its core promise, with a gimmick you’ll forget about and a storage issue you’ll need to manage.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.