Opens at 11 AM
Slime birthdays in BellevueBellevue, WA
Factoria Marketplace
One very gooey guest of honor. Take a look at what a party involves, then talk to the team.
Ready when you are.
Tickets
Walk-in style slime making sessions for kids and families.
Birthday parties
Hands-on slime birthdays and private celebrations.
Groups and field trips
Classes, scouts, camps and school field trips.
See current prices and availability in Bellevue’s Roller checkout. Call or email the Bellevue team with location-specific questions.
Finding the door
Find us at Factoria Marketplace.
We are at 3929 Factoria Square Mall SE, Ste D4.
DirectionsHow a session goes
Lab coat on. Hands in.
- 1
Suit up
Kids get into lab coats and safety goggles. Instantly more scientific.
- 2
Mix it
Stir, pour and watch it turn from liquid to goo at the lab bench.
- 3
Stretch it
Pull, poke and test how far your slime can go.
A seven-second silent video showing children in lab coats and safety goggles exploring and stretching slime.Real kids, real goo
Mix it blue. Stretch it far.
Every scientist mixes their own batch, then gets to find out exactly how stretchy it is.
What a slime session looks like at The Slime Factory. Representative brand photo.
Photo walkthrough
Take a look around.
Tap any photo to see it larger. Use the arrow keys to move between photos and Escape to close.
Colorful space for party people.
Bellevue has one party area. Ask the team about guest capacity, package details and availability, below or by phone.
Every guest goes home stretching.
The best part: testing how far it goes. Representative brand photo.
Give the goo
Gift Cards
The perfect experience-based gift for kids!
- Valid online and in-store.
- Location-specific: gift cards purchased at The Slime Factory Bellevue may only be redeemed at the Bellevue location.
Fresh from the Bellevue lab
Offers and news.
Current offers
- Slime coupon
20% OFF Tickets
More stretching. More squishing. Save 20% on your slime experience tickets.
Use code
Valid through Oct 31, 2026
Enter the code in Roller checkout. Eligibility and availability are confirmed at checkout.
- Slime coupon
15% OFF Weekday Parties
Make their big day a little slimier. Save 15% on a weekday birthday party.
Use code
Valid through Dec 31, 2026
Weekday parties only. Eligibility and availability are confirmed at checkout.
- Slime coupon
$25 OFF Your Next Slime Party!
Book a ticket & receive a $25 OFF coupon by email to use toward any birthday party package.
Valid through Dec 31, 2026
Book your party by December 31, 2026, to redeem. Cannot be combined with other coupons or discounts.
Find and contact us
- 3929 Factoria Square Mall SE, Ste D4 Bellevue, WA 98006
- 206 486 0461
- washington@theslimefactory.com
About this location
Make and decorate slime at The Slime Factory in Bellevue. Find admission, birthday party and field trip information for Factoria Marketplace.
Packages
General admission: 30–60 minutes, two custom slimes, protective gear, sensory pool, certificate and photo opportunities. Party area: 5–30 slime makers. Parties last 2 hours, plus 30 minutes for setup. Field trips: 15–50 slime makers, Monday–Friday, 90 minutes.
Good to know
Children 2+ need a ticket. Children under 14 must be accompanied by an adult. Reservations are non-refundable, including cancellations and no-shows. Rescheduling requires at least 24 hours and is subject to availability. Events require advance reservations. Final payment and changes are due 72 hours before the event. All guests must sign waivers. Food, cake and decorations are allowed with a party package, not general admission or field trips.