Kids' STEM Classes in Chelsea, NYC | Genius Gems
Weekly STEM classes, taught by our own team.
Weekly classes at Genius Gems Chelsea — 555 6th Avenue, New York, NY 10011
Small-group classes for kids, once a week, all semester: design, engineering, chemistry, robotics and coding. Every class is hands-on, and the topics change every semester so there is always something new to learn.
- Grades: Pre-K – 6th grade (Pre-K in Millburn)
- Semester: Winter 2027: Jan 4 – Apr 21
- Class length: 45 minutes, once a week
School pickup is included for registered students from Academy of Saint Joseph (AOSJ), Friends Seminary, PS 11, PS 41 and PS 340
This semester's classes
Pick a class by grade and weekday. Enroll for the semester, or book a one-time trial class first.
Chelsea, NYC — Winter 2027: Jan 4 – Apr 21
Winter 2027 classes
Registration is open.
Early bird: 10% off semester enrollments completed by November 6 at 11:59 PM (Eastern). You're welcome to book a trial class first, but if you enroll after November 6 you pay the regular price. We can't apply the discount after the deadline. Prices on this page are regular prices. The 10% comes off at checkout.
Game Coding — 2nd – 4th
Mondays, 3:45 PM – 4:30 PM · Jan 4 – Apr 19 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 14: $722 · 19 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 4, 11, 25 · Feb 1, 8, 22 · Mar 1, 8, 15, 22, 29 · Apr 5, 12, 19
No class: Jan 18 (MLK Day), Feb 15 (Presidents Day / Mid-Winter Break)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Kids don't just play games here, they code and design them! Students learn what makes a game fun, from goals and rules to challenges and rewards, then design and code their own video games in Scratch, adding characters, levels, and sound effects.
STEAM Lab — K – 1st
Mondays, 3:45 PM – 4:30 PM · Jan 4 – Apr 19 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 14: $722 · 19 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 4, 11, 25 · Feb 1, 8, 22 · Mar 1, 8, 15, 22, 29 · Apr 5, 12, 19
No class: Jan 18 (MLK Day), Feb 15 (Presidents Day / Mid-Winter Break)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Our STEAM Lab learners explore Science, Technology, Engineering, Art, and Math through experiments, engineering challenges, and hands-on exploration with kid-friendly robots. Each week builds logical thinking, creativity, and design skills, giving kids a sampling of the classes…
New Content: Open to both new and continuing students.
Mad Science — K – 4th
Mondays, 4:45 PM – 5:30 PM · Jan 4 – Apr 19 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 14: $722 · 19 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 4, 11, 25 · Feb 1, 8, 22 · Mar 1, 8, 15, 22, 29 · Apr 5, 12, 19
No class: Jan 18 (MLK Day), Feb 15 (Presidents Day / Mid-Winter Break)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Bubbles, fizz, and "wow!" moments every week. Scientists explore acid and base reactions, discover the laws of science that govern energy and motion, and even make edible experiments they get to taste. Along the way, they begin thinking like real scientists: asking questions,…
New Content: Open to both new and continuing students.
Tech Creator Lab — 3rd – 6th
Mondays, 4:45 PM – 5:30 PM · Jan 4 – Apr 19 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 14: $722 · 19 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 4, 11, 25 · Feb 1, 8, 22 · Mar 1, 8, 15, 22, 29 · Apr 5, 12, 19
No class: Jan 18 (MLK Day), Feb 15 (Presidents Day / Mid-Winter Break)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Students build, design, and troubleshoot working systems with circuits, motors, gears, and generators, and explore magnetism and propulsion through Newton's Laws. Every project challenges kids to think like engineers: test it, find what's not working, and make it better. This…
New Content: Open to both new and continuing students.
Tech Creator Lab — 3rd – 6th
Tuesdays, 3:45 PM – 4:30 PM · Jan 5 – Apr 20 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 15: $760 · 20 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 5, 12, 19, 26 · Feb 2, 9, 23 · Mar 2, 16, 23, 30 · Apr 6, 13, 20
No class: Feb 16 (Mid-Winter Break (NYC)), Mar 9 (Eid al-Fitr)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Students build, design, and troubleshoot working systems with circuits, motors, gears, and generators, and explore magnetism and propulsion through Newton's Laws. Every project challenges kids to think like engineers: test it, find what's not working, and make it better. This…
New Content: Open to both new and continuing students.
Intro to LEGO® Robotics — K – 1st
Tuesdays, 4:45 PM – 5:30 PM · Jan 5 – Apr 20 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 15: $760 · 20 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 5, 12, 19, 26 · Feb 2, 9, 23 · Mar 2, 16, 23, 30 · Apr 6, 13, 20
No class: Feb 16 (Mid-Winter Break (NYC)), Mar 9 (Eid al-Fitr)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Young coders build with LEGO® Education Computer Science & AI kits and bring their creations to life using simple, icon-based coding. Working in small teams, kids explore the building blocks of computer science, including events, sequences, and loops, as their models move and…
Engineering & Design — K – 1st
Wednesdays, 3:45 PM – 4:30 PM · Jan 6 – Apr 21 · Half semester $600 · 15 classes ($40 per class) · Full semester to Jun 16: $836 · 22 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 6, 13, 20, 27 · Feb 3, 10, 24 · Mar 3, 10, 17, 24, 31 · Apr 7, 14, 21
No class: Feb 17 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Now inviting young engineers to challenge their creativity! This class will promote inventive thinking combine it with an attention to artistic design. Students will dream up their own projects, ideas, and inventions and bring them to life, iterating upon and improving their…
Game Coding — 1st – 2nd
Wednesdays, 3:45 PM – 4:30 PM · Jan 6 – Apr 21 · Half semester $600 · 15 classes ($40 per class) · Full semester to Jun 16: $836 · 22 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 6, 13, 20, 27 · Feb 3, 10, 24 · Mar 3, 10, 17, 24, 31 · Apr 7, 14, 21
No class: Feb 17 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Kids don't just play games here, they code and design them! Students learn what makes a game fun, from goals and rules to challenges and rewards, then design and code their own video games in Scratch, adding characters, levels, and sound effects.
Advanced LEGO® Robotics — 4th – 6th
Wednesdays, 4:45 PM – 5:30 PM · Jan 6 – Apr 21 · Half semester $600 · 15 classes ($40 per class) · Full semester to Jun 16: $836 · 22 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 6, 13, 20, 27 · Feb 3, 10, 24 · Mar 3, 10, 17, 24, 31 · Apr 7, 14, 21
No class: Feb 17 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
For builders and coders ready for a bigger challenge. Students design more complex LEGO® models with multiple motors, a color sensor, and a controller, then program them using conditionals and variables to solve multi-step design challenges. The session builds to a unit on AI…
Design Studio — 1st – 4th
Wednesdays, 4:45 PM – 5:30 PM · Jan 6 – Apr 21 · Half semester $600 · 15 classes ($40 per class) · Full semester to Jun 16: $836 · 22 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 6, 13, 20, 27 · Feb 3, 10, 24 · Mar 3, 10, 17, 24, 31 · Apr 7, 14, 21
No class: Feb 17 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Design Studio students get hands on experience with production and crafting techniques, challenging their creativity. Students will learn classic production methods such as loom weaving, yarn dyeing, and orgami while seeing demonstrations of how modern day technology (like 3D…
Advanced Coding with Python — 4th – 6th
Thursdays, 3:45 PM – 4:30 PM · Jan 7 – Apr 15 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 17: $760 · 20 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 7, 14, 21, 28 · Feb 4, 11, 25 · Mar 4, 11, 18, 25 · Apr 1, 8, 15
No class: Feb 18 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Ready for text-based coding? Students make the leap from block coding to Python, one of the most widely used programming languages in the world, powering everything from video games to artificial intelligence. They write programs line by line, advancing their understanding of…
Prerequisite: a completed block coding course, such as our Coding 2 or Game Coding (2nd–4th), or a comparable Scratch course. For 4th grade and up; exceptional younger students may join with the instructor's permission.
Engineering & Tech — 1st – 2nd
Thursdays, 3:45 PM – 4:30 PM · Jan 7 – Apr 15 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 17: $760 · 20 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 7, 14, 21, 28 · Feb 4, 11, 25 · Mar 4, 11, 18, 25 · Apr 1, 8, 15
No class: Feb 18 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Kids discover how things work by building them. Students wire their first circuits, explore magnetic forces, and design structures that stand up to testing, with an age-appropriate introduction to Newton's 1st and 3rd Laws. Sample projects include a light-up LED projects, a…
New Content: Open to both new and continuing students.
Intro to LEGO® Robotics — K – 1st
Thursdays, 4:45 PM – 5:30 PM · Jan 7 – Apr 15 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 17: $760 · 20 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 7, 14, 21, 28 · Feb 4, 11, 25 · Mar 4, 11, 18, 25 · Apr 1, 8, 15
No class: Feb 18 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Young coders build with LEGO® Education Computer Science & AI kits and bring their creations to life using simple, icon-based coding. Working in small teams, kids explore the building blocks of computer science, including events, sequences, and loops, as their models move and…
LEGO® Robotics — 2nd – 3rd
Thursdays, 4:45 PM – 5:30 PM · Jan 7 – Apr 15 · Half semester $560 · 14 classes ($40 per class) · Full semester to Jun 17: $760 · 20 classes ($38 per class) · One-time trial class $47.50
Class dates: Jan 7, 14, 21, 28 · Feb 4, 11, 25 · Mar 4, 11, 18, 25 · Apr 1, 8, 15
No class: Feb 18 (Mid-Winter Break (NYC))
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $55 a class (instead of $40), for the whole semester
Kids build LEGO® models that move, sense, and react, then code them to take on hands-on design challenges. Building on coding basics like events and loops, students begin using conditionals ("if this happens, then do that") so their creations can make decisions on their own.…
Design Bar Club — K – 5th
Fridays, 3:45 PM – 4:30 PM · Jan 8 – Apr 16 · Half semester $455 · 13 classes ($35 per class) · Full semester to Jun 18: $660 · 20 classes ($33 per class) · One-time trial class $42.50
Class dates: Jan 8, 15, 22, 29 · Feb 5, 12, 26 · Mar 5, 12, 19 · Apr 2, 9, 16
No class: Feb 19 (Mid-Winter Break (NYC)), Mar 26 (Good Friday)
Location: Genius Gems NYC (Chelsea)
Stay and play: 3:00 – 5:30 PM · $50 a class (instead of $35), for the whole semester
The ultimate after-school club for creative kids, held right at our Design Bar as much as possible. Each week starts with a short guided lesson, then members dive into an open-ended project, rotating through everything the Design Bar has to offer: slime, Glitter Tiles, Locker…
Browse all classes at Chelsea, NYC
It's not too late to try a class this fall
Our fall classes are still running. Book one trial class to see if it's a fit, then join for the rest of the semester.
- Coding 2 — Mondays, 3:45 PM · One-time trial class $47.50
- STEAM Lab — Mondays, 3:45 PM · One-time trial class $47.50
- Engineering 2 — Mondays, 4:45 PM · One-time trial class $47.50
- Engineering 2 — Tuesdays, 3:45 PM · One-time trial class $47.50
- Coding 1 Plus — Wednesdays, 3:45 PM · One-time trial class $47.50
- STEAM Lab — Wednesdays, 3:45 PM · One-time trial class $47.50
- Advanced Robotics with VEX© — Wednesdays, 4:45 PM · One-time trial class $47.50
- Design Studio — Wednesdays, 4:45 PM · One-time trial class $47.50
- Coding 3 — Thursdays, 3:45 PM · One-time trial class $47.50
- Engineering 1 — Thursdays, 3:45 PM · One-time trial class $47.50
- FIRST® LEGO® League Robotics — Thursdays, 4:45 PM · One-time trial class $47.50
- Design Studio — Fridays, 3:45 PM · One-time trial class $47.50
Be the first to know when spring registration opens
Leave your email and we'll tell you the moment spring classes are open to book.
The weekly schedule
Days across the top, time slots down the side. Stars mark the first and last day of the semester.
Chelsea, NYC — Winter 2027
Stay and play
Stay and Play is supervised drop-off time for children enrolled in a class whose family adds play time when they register. Before or after class, kids build and earn tokens, and explore our robot and marble-run stations with our team. Everyone is picked up by 5:30 PM. Choose the play option when you enroll.
Chelsea, NYC
- Class only: $40 a class, for the whole semester
- 45-minute class plus supervised play time: $55 a class (instead of $40), for the whole semester
- Play time: 3:00 – 5:30 PM
With school pickup, our team walks kids over from school; they play, take their class and are picked up by 5:30 PM.
Just need pickup and play?
Not looking for a class? Sign up for school pickup and supervised play on its own. Our team walks your child from school to Genius Gems, where they play until you pick them up.
Monday to Friday: Mondays, Tuesdays, Wednesdays, Thursdays, Fridays
- Until 4:15 PM: from $432 for the whole semester
- Until 5:30 PM: from $600 for the whole semester
See pickup and supervised play
Real STEM, every week
For more than eight years, our small-group classes have been the heart of Genius Gems. Every class is hands-on: kids design, build, break and iterate with our own instructors. The topics change every semester, so a child can keep coming back and always learn something new.
- Hands-on, every class — Kids build, test and fix real projects: circuits, reactions, robots, code.
- Small groups — Capped class sizes so every child gets the instructor's attention.
- Our own instructors — Taught by the Genius Gems team, not a franchise curriculum.
- New topics every semester — No repeats. Fall, winter and spring each bring a fresh line-up.
How to join
Enrolling takes a few minutes online.
- Pick a class — Browse this semester's classes by location, grade and weekday.
- Try it first, or enroll — Book a one-time trial class, or enroll for the whole semester.
- New students: a short recommendation — For a child's first Genius Gems class we ask for one short teacher recommendation. Once per child; future semesters skip this step.
- You're in — We confirm your child's spot and send everything you need before the first class.
Pricing
Classes are sold by the semester. Each class card above shows the semester price and the number of classes. Joining after the semester has started? You pay only for the classes that are left.
Sales tax and a 3% card processing fee are added at checkout.
Cancellation policy
Full refund minus a 10% processing fee up to the early-cancel date. 50% refund up to the mid-cancel date. No refunds after that. Exact dates for this semester are published with the class policies.
School pickup — New York City
We walk NYC students from school to class.
Our staff meet students at dismissal at these schools and walk them to Genius Gems for their class. Just tell us the school when you enroll. For school pickup with a 4:45 PM class, choose the 2.5-hour session when you enroll.
We pick up from:
- Academy of Saint Joseph (AOSJ)
- Friends Seminary
- PS 11
- PS 41
- PS 340
Don't see your school? Ask us. We add schools as families need them.
Classes at Genius Gems
Questions parents ask
Can we try a class first?
Yes, and it's the easiest way to start. Almost every class offers a one-off trial class at the trial price shown on its card. Booking one takes a minute: pick the class, tap Details & enroll and choose the trial. No application or teacher recommendation is needed to try a class.
What ages are the classes for?
Kindergarten through 6th grade, grouped into grade bands so the level fits. Millburn also runs Pre-K and Kindergarten classes. Pre-K students must be entering kindergarten in September 2027.
How long is a semester?
Fall, winter and spring each run for a set number of weeks. The exact count and dates are on each class card and in the schedule chart.
Do lessons repeat semester to semester?
No. Class lessons change every semester, so kids can enroll every term and always learn something new.
Is a teacher recommendation always required?
Only for a child's first-ever Genius Gems class. Once we have one on file, future semesters skip this step.
What if my child misses a class?
Enrolled students can request one make-up per semester in a comparable class, subject to space. NYC full-semester enrollments (January through June) include two.
What's the cancellation policy?
Full refund minus 10% by the early-cancel date, 50% by the mid-cancel date, none after. Exact dates for this semester are in the class policies.
Pick a location and grab a spot.
Classes fill on a first-come basis. Choose your location to see the schedule and enroll.
Genius Gems Chelsea, NYC
555 6th Avenue, New York, NY 10011
Classes at Chelsea, NYC · Directions · Kids' STEM classes in Chelsea, NYC
Genius Gems Millburn, NJ
215 Millburn Avenue, Millburn, NJ 07041
Classes at Millburn, NJ · Directions · Kids' STEM classes in Millburn, NJ
Questions? Email information@geniusgems.com