☀️ Summer Slime Season is Here
The slime party that lands at your door
A fully-stocked slime cart shows up at your kid's birthday party. We run the whole thing. You don't lift a finger.
1.5 hrs
of hands-on slime fun
20+
cosmic mix-ins and toppings
100%
setup and cleanup included
How It Works
Book it. We show up. Kids go cosmic.
01
Pick Your Package
Choose the party size and vibe that fits. Galaxy, glow-in-the-dark, rainbow, unicorn, or go custom.
02
We Show Up Ready
Our slime cart arrives fully stocked — glue, activators, colors, glitter, charms, beads, scents, and aprons.
03
Kids Create, You Relax
Every kid makes their own cosmic slime to take home. We guide them through it, handle the mess, and pack up clean.
Packages
Parties that don't break the bank
Starter
$199 / party
- Up to 5 kids
- 1 custom slime per kid
- 1 hour of slime-making
- Basic mix-in station
- Aprons provided
- Full setup and cleanup
Most Popular
Deluxe
$299 / party
- Up to 7 kids
- 1 custom slime per kid
- 1.5 hours of fun
- Premium cosmic mix-ins
- Themed decorations
- Take-home containers
Ultimate
$399 / party
- Up to 10 kids
- 1 custom slime per kid
- 2 hours of slime time
- Glow-in-the-dark option
- Slime goodie bags
- Birthday kid gets VIP extras
Got Questions?
Everything parents want to know
How long does a Cosmic Slime party last?
Each party includes approximately 1 hour of hands-on slime making. The total time at your home — including setup and cleanup — is typically around 1.5 to 2 hours depending on the package.
What areas do you serve?
We currently serve the Lehigh Valley — including Allentown, Bethlehem, Easton, and surrounding areas. Not sure if we reach you? Reach out and we'll let you know.
How far in advance should I book?
We recommend booking at least 2 weeks in advance. Weekend dates fill up fast, especially in spring and summer — the earlier you lock in your date, the better.
What's included in each package?
Every package includes all slime-making supplies (glue, activators, colors, glitter, mix-ins), hands-on instruction from us, and containers so every kid takes their slime home. Higher packages add premium mix-ins, themed decorations, and more kids.
Do kids get to keep their slime?
Yes! Every kid takes home 1 custom slime they made themselves — in their own container. It's half the fun.
How does payment work?
Deposit depends on when you book: if your party is more than 7 days away, a $75 deposit holds your date — the remaining balance is due 7 days before the party. If your party is 7 days away or less, the full package amount is due at booking. The deposit always applies toward your total.
What if I need to cancel?
Life happens — we get it. The deposit is non-refundable if you cancel within 3 days of the party. If you cancel earlier than that, we'll work with you. Rescheduling is always an option.
Do you handle setup and cleanup?
Yes — 100%. We arrive early, set everything up, run the full slime session, and pack up everything when we're done. All you need to provide is the space and the kids.
Every kid deserves a party they'll never stop talking about
Cosmic Slime is bringing mobile slime parties to the Lehigh Valley. No venue needed. No cleanup stress. Just pure, colorful, squishy joy delivered to your doorstep.