Genius Gems
Private
Genius Gems runs project-based STEM summer camps for children in grades K-6, with weekly themes such as Maker and Design Lab, LEGO Engineering, Coding, Slime Lab, Kitchen Chemistry and Game Design Lab, taught in small groups. Half-day camps are three hours (9am-12pm or 12:30-3:30pm) at the 215 Millburn Avenue studio, while full-day camps run 9am-3pm at Congregation B'nai Israel down the street. The organization also offers STEM classes, robotics teams and competitions, drop-in building sessions and STEM birthday parties.
The practical details
We list only what the camp itself publishes, and programs change — dates, prices, ages and availability can all move after we check. Confirm the details on the camp’s own website and contact Genius Gems directly before you register or pay. Last checked August 2026.
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Google Reviews
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★★★Avinash AroraIt was fun, but I was hoping there was more to it than magnatiles. I also hate that you have to pay for adult entry as well, you're being incentivized only bring one parent and yet they are very strict about watching your children, so wouldn't you want more adults present? Also found a few broken tiles, one so badly broken that a magnet was missing which means at some point there was an extremely dangerous choking hazard around somewhere. Someone did personally call me to find out why I only gave 3 stars which is encouraging. Maybe they're genuinely open to feedback.
★★★★★Fanny AranaI loved GG and my daughter keeps talking about so much! We went today, with my daughter who is in a wheelchair- everyone was to kind, attentive and helpful. Hannah helped us since the second we got in and my daughter just loved her! They offered to move furniture if necessary for my daughter to ambulate freely through! I just felt such a lovely and welcoming environment, hard to find lately for people with special accommodations. Very clean space also! I just loved it! We’ll be back. Thank you so much GG!
★★★★★Natalia NoceAlways an amazing experience. Went to the Millburn location yesterday afternoon with four kids ages 4-6 and the staff was so kind and enthusiastic. This one worker, Sophia, went out of her way to engage my introverted nephew who was not sure what to do or how to navigate the space. The tokens for creation and clean up have my kids running to engage in STEM activities. As an adult, I find the entire experience stress free and rewarding.
★★★★★Lexi SantosI 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
★★★★Hank ChangCool little shop for kids to create; they also have some 3d printers and classes to think about machines and a ton of the magnetic tiles to play with. Good for kids to entertain at a drop in 90min session or a full camp or membership.