Slimey Magoo logoSlimey Magoo Book a Party
Tri-Cities, WA • Mobile Birthday Parties

We bring the slime bar to your party!

Kids build their own custom slime with toppings and charms — we bring everything, run the fun, and clean up. You just pick a date.

Pick a Date See Pricing
$250 • 1 hour • up to 10 kids • travel included within 20 miles of West Richland

Booking is easy

Three steps between you and a party full of happy, slimy kids.

1

Pick a date online

Choose an open date and time from our calendar below and tell us a little about the birthday kid.

2

We call you within 24 hours

We'll confirm the details, answer questions, and collect the $75 deposit to lock in your date.

3

Party day!

We show up, set up the slime bar, guide the kids through making their slime, and clean up when we're done.

Party Package

One simple price. Everything included.

Slimey Magoo Party Package
$250
1 hour • up to 10 kids
Book This Package

Every party includes

  • Guided slime bar experience
  • One 8 oz custom slime per child
  • Choice of slime and mix-ins
  • 4 toppings + 2 charms per child
  • Containers and all supplies
  • Setup and cleanup
$15
Each additional child
$75
Extra 30 minutes
$75
Nonrefundable deposit (applied to your total)
Travel included within 20 miles of West Richland — Richland, Kennewick, Pasco, Benton City and more

Meet the slime crew

Our mascots keep the party going (and remind everyone to wash their hands).

Professor Goo, the slime scientist mascot

Professor Goo

Head slime scientist. Runs the slime bar and knows every mix-in by heart.

Lottie the axolotl mascot hugging a jar of slime

Lottie the Axolotl

Chief taste-tester of toppings (just kidding — slime is not edible!).

Slimy Warnings: slime is not edible, wash hands before and after playing, not suitable for ages below 5, may contain small parts

Safe, slimy fun

We take the mess so you don't have to — and we keep it safe.

  • Ages 5 and up. Slime and charms include small parts, so our parties are best for kids 5+.
  • Adult supervision required. A parent or guardian stays present for the whole party.
  • Slime is not edible. Everyone washes hands before and after playing.
  • What's in it: our slimes may contain glue, borax, clay, colorings, shaving cream, scents, glycerine, soap or lotions. Let us know about any sensitivities when we call.
  • We clean up. Table covers, containers, and cleanup are all on us.

Questions?

Quick answers below — or ask Professor Goo in the chat bubble.

How much does a party cost?

$250 for a 1-hour party with up to 10 kids. Extra kids are $15 each, and you can add 30 minutes for $75. A $75 nonrefundable deposit holds your date and is applied to your total.

What area do you serve?

Travel is included within 20 miles of West Richland — that covers Richland, Kennewick, Pasco, Benton City and the surrounding area. Outside that? Book anyway and we'll talk about it when we call.

What ages is this for?

Ages 5 and up. Slime contains small parts and isn't suitable for kids under 5.

What do I need to provide?

Just a table (or two) and a spot for the kids to sit. We bring the slime, mix-ins, toppings, charms, containers, table covers and everything else.

Do the kids take their slime home?

Yes! Every child leaves with their own 8 oz custom slime in a container.

Is the booking confirmed when I pick a date?

Picking a date reserves your spot in our calendar. We call within 24 hours to confirm details and collect the $75 deposit — that's when your date is officially locked in.

Can you do parties indoors?

Yes — homes, party rooms, community centers, backyards. We cover tables and clean up, so slime indoors is no problem.

Pick your party date

Choose an open date and time below. We'll call you within 24 hours to finalize everything.

Heads up: your date is held once you pick it, and locked in when we confirm the $75 deposit on our call.

Loading the calendar… If it doesn't appear, email hello@slimeymagoo.com and we'll get you booked.