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Genius Gems

4.8 ★★★★★ 79 Google reviews · Indoor playground in Millburn, New Jersey

Hosts birthday parties
Genius Gems, indoor playground in Millburn, NJ — photo 1
Genius Gems, indoor playground in Millburn, NJ — photo 2
Genius Gems, indoor playground in Millburn, NJ — photo 3
Genius Gems, indoor playground in Millburn, NJ — photo 4
Genius Gems, indoor playground in Millburn, NJ — photo 5

Plan your visit

Hours

Monday 1–5 PM
Tuesday 10:30 AM–5 PM
Wednesday 10:30 AM–5 PM
Thursday 10:30 AM–5 PM
Friday 10:30 AM–5 PM
Saturday 10:30 AM–5 PM
Sunday 10:30 AM–5 PM

Hours can shift for holidays and private events — worth a quick check before a special trip.

What parents highlight

The things reviewers bring up again and again across 79 Google reviews — with their own words as proof.

🧼 spotless & clean 7 mentions

“They have a gorgeous, clean and beautifully lit facility and the materials used in the camps and classes range from homemade slime to robotics.”

What parents say

Genius Gems is a FABULOUS place to celebrate a birthday! My son enjoyed his experience at their Lego and Coding Summer Camps so much that he asked to host his 7th Birthday there as well. I'm so glad he did! Highlights: 1.

★★★★★ — Melissa, Jan 2023

As a professor in a medical school, I was amazed at how Genius Gems' programs parallel the evolution of medical education. As we have evolved from "sage on stage" to "guide on the side", I observed Genius Gems staff assisting children in the collaborative process of discovery, creativity, and problem-solving with…

★★★★★ — Ronald, Aug 2024

My 6 y.o. really enjoyed the engineering class at Genius Gems. Issa, the instructor who worked closely with my son, went above and beyond to help him during class and to make him feel comfortable. The facility is clean and spacious (and so pretty!).

★★★★★ — Katarzyna, Aug 2021

I visited yesterday with my sister for her birthday and had a blast. The atmosphere is so fun and encouraging lots of creativity. There is a lot to do and we got to try out a bunch of things including the design bar where I got to make a title of my own. Very fun experience, definitely recommend

★★★★★ — Lexi, Aug 2024

Excerpts from public Google reviews. Read all 79 reviews →

Birthday parties at Genius Gems

Genius Gems hosts birthday parties, going by their listing and parent reviews. Packages, party rooms, and pricing change often, so check the current options and book ahead — weekend slots go fast at popular playgrounds.

Check party info on their site

Where to find Genius Gems

215 Millburn Ave, Millburn, NJ07041

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Indoor playgrounds near Genius Gems

M & Em's Imagination: a Toddler Play Space

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2.4 miles away

Little Brain Lab

4.2 ★★★★☆ 62 reviews

76 W South Orange Ave st 04, South Orange Village, NJ

Hosts birthday parties Toddler-friendly spotless & cleangreat for toddlersbirthday party favorite

Clean venue for toddlers featuring soft play areas, an interactive space and slides.

2.6 miles away

Sky Zone Trampoline Park

4.2 ★★★★☆ 1,422 reviews

25 US-22, Springfield, NJ

Hosts birthday parties spotless & cleanbirthday party favoritefriendly staff

Chain of indoor trampoline parks featuring freestyle bouncing, dodgeball, fitness programs & more.

2.7 miles away

All indoor playgrounds in Millburn, NJ →

Listing verified July 2026 from public business records and parent reviews. Something out of date? Report a correction. Own this playground? Claim your listing — it's free.