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3 projects a month · ages 5 to 12+ · free shipping

Monthly STEM Kits for Kids 5 to 12+

Three projects plus three science lessons every month, delivered with batteries in the box. No screens, no last-minute store run. Just open the box and start.

Choose Your Subscription
  • From $29.92/mo
  • Ages 5 to 12+
  • NGSS aligned
  • ESA eligible
Two girls building a hands-on STEM Discovery Box water filtration experiment together
3 projects + 3 lessons per box All supplies included, even batteries From $29.92/mo on the annual plan Cancel anytime

Recognized by

Funding & Marketplace Partners

ClassWallet Step Up For Students MyFloridaMarketPlace Georgia Promise Utah Fits All Odyssey Children's Scholarship Fund Girl Scouts

Schools, Districts, Organizations

LA GATOR Scholarship Program Arizona Dept. of Education South Carolina Dept. of Education The School District of Philadelphia TechnipFMC Harmony Public Schools Project Lead The Way Heartland Charter School Arkansas Dept. of Education Peoria Unified School District Valley Oaks Charter School

Featured in

Popular Mechanics Parents' Choice Sciencing STEM Geek The Maker Mom Cratejoy Mombrite Made in a Pinch The Burg MomTrends

Pick your age range

Projects are matched to age tier, so each kid gets a build suited to their level.

K-2 Starter Series for ages 5 to 7

Two children with colorful cups outdoors, from a STEM Discovery Box hands-on activity

The same projects, made kinder-friendly: 10 to 20 minute builds, picture-led instructions, and results a five-year-old sees straight away. Three curated boxes, three projects in each, all supplies pre-portioned, free shipping on every plan.

  • Month-to-month$38
  • 3 months$109
  • 6 months$209

Extended subscriptions coming soon!

  • Crystal garden
  • Glowing bouncy balls
  • Magic sand
  • Fossil casting
  • Foaming fountain
  • Bubble sculptures

The series cycles box 1, 2, then 3 and repeats, so your first box is whichever one is shipping when you join.

Choose Ages 5 to 7

Deeper experiments for ages 7 to 12+

A boy watching a glowing lava lamp science project he built from a STEM Discovery Box

Builds that stretch curious older kids: CO2 rockets, polymer foam, and a working periscope. More steps and real lab vocabulary, matched to age tier, with the same all-supplies-included box.

Choose Ages 7 to 12+

How it works

It arrives, they build, they keep exploring

  1. The box arrives

    A new box lands each month with 3 complete projects plus 3 science lessons, supplies pre-portioned, even the batteries.

  2. They build all three

    Open it and start. Clear step cards walk your child through real circuits, chemistry, and engineering.

  3. They keep exploring

    Three builds stretch across the month, so the learning keeps going. Next month, a brand-new box of three.

More projects than other boxes

3STEM Discovery Boxes
1Typical subscription box

Same monthly price range, three times the science.

The official STEM Discovery Boxes supply list card showing every real supply included for the three monthly projects

What's in the box

Open it and start. Everything's included.

Three complete projects plus three science lessons, supplies pre-portioned down to the batteries. No screens, no store run.

  • 3 STEM projects, 3 topics, and 3 science lessons monthly
  • All the needed supplies are included, even the batteries
  • NGSS and Common Core aligned
  • Made or assembled in the USA

What your child builds

Real builds they can't wait to try

A sample of the projects inside recent boxes. Supplies are in the box, even the batteries.

  • Bouncy Balls

    Create one-of-a-kind bouncy balls while learning about elasticity, phosphor, potential energy, and kinetic energy. Ages 5 to 12+.

  • Glow Art

    Create glowing pictures, secret disappearing messages, and a glowing top—all with the power of light! Ages 5 to 12+.

  • Neon Lamp

    Create your own custom EL wire neon-style light while learning about phosphors and electroluminescence. Ages 7 to 12+.

  • Light-Up Terrarium

    Create your own light-up terrarium while learning about ecosystems, the water cycle, photosynthesis, and botany. Ages 5 to 12+.

No lock-in

Pause, skip, or cancel anytime

Manage everything from your account. No contract, no cancellation fee. Free shipping on every plan.

  • Cancel anytime
  • Pause or skip any month
  • No cancellation fee
  • Free shipping every plan

Straight answers

Worth it, every month

  • Boxes I bought before fell apart.

    Every project ships with sturdy, real supplies and clear instructions. You get 3 builds a month, not a flimsy one-and-done.

  • One activity, then it's clutter.

    Three complete projects plus three lessons per box, so the science keeps going for days, not twenty minutes.

  • Last time I had to buy the 'included' supplies.

    Supplies are in the box, down to the batteries. No craft-store run and no hidden list.

  • Is it just more screen time?

    These are projects: circuits, chemistry, engineering. No app and no screen required.

  • Subscriptions trap you with auto-renew.

    Pause, skip, or cancel anytime from your account. No lock-in and no cancellation fee.

Choose your term

Pricing for the ages 7 to 12+ box. From $29.92/mo on the annual plan, longer terms save more, free shipping on every plan. The ages 5 to 7 Starter Series starts at $38 month to month (pick it above).

  • Month-to-month $37.95per month Choose
  • 3 months $109$36.33/mo Choose
  • Most popular 6 months $209$34.83/mo Choose
  • 9 months $289$32.11/mo Choose
  • Best value 12 months $359$29.92/mo Choose

Checkout opens with Subbly, our subscription partner. You will review your plan and shipping before you pay. Cancel anytime, no fee.

In their words

What families say

  • My son loves his STEM Discovery Box

    Each month brings 3 hands-on projects we do together: fun, educational, and age-appropriate. The experiments have become one of our family's favorite activities.

    Keith H.

    Customer review shared with STEM Discovery Boxes

  • These boxes are amazing

    My students were fully engaged and couldn't wait to explore each project. Clear directions, awesome results, and tons of learning packed into every box. Highly recommend.

    Mrs. Smith

    Customer review shared with STEM Discovery Boxes

  • Almost better than Disney

    Got this for my grandson and he said the only thing better would be Disney. He's made VR goggles, a hydraulic claw, and more. Creative, exciting, and absolutely worth the money.

    Linda C.

    Customer review shared with STEM Discovery Boxes

  • Perfect gift for curious kids

    My daughter built glowing bouncy balls and a VR viewer, all by herself. Easy-to-follow instructions explain the science behind the fun. We can't wait for next month.

    Amanda L.

    Customer review shared with STEM Discovery Boxes

  • Science for the whole family

    Our grandkids look forward to every delivery. The experiments are fun for all ages, even grandpa joins in. It's the best bonding time and an incredible way to make science exciting at home.

    Nana P.

    Customer review shared with STEM Discovery Boxes

From our customers

Photos families sent us

Real kitchens, real counters, real experiments. These came in from families and classrooms using the boxes.

  • A girl at a table holding up her finished build beside a blue STEM Discovery Box, a small light glowing on the paper in front of her
  • A smiling boy at a table beside a plate of candies bleeding their colours into a rainbow
  • Four children around a table with paper plates of candies bleeding color into water, while an adult in a white lab coat stands and leads the activity
  • A boy outdoors opening a supply packet beside three tall tubes of coloured liquid in a blue stand
  • A child holding up a test tube of blue liquid, mid-project
  • A dropper forming red polymer strands in a tray of white powder
  • A child squeezing liquid from a bottle into a bowl on a kitchen counter
  • Foam rising out of two bottles onto paper plates, beside a plate of colour-diffusion candies
  • Hands assembling the wooden mechanical locking safe, its hinges and latch already fitted
  • A child holding up the finished wooden locking safe they built
  • The bouncy ball project's supplies laid out beside its printed instruction card
  • A girl sitting on a rug building a small wooden car
  • A girl and a woman at a table mixing blue slime in a cup
  • A girl and a woman working on a project together at a table in front of library bookshelves
  • A boy sitting by a Christmas tree holding up a STEM Discovery Box
  • A laughing girl holding a STEM Discovery Box
  • A girl at a table painting the planets of a solar system model
  • A woman handing a STEM Discovery Box to a girl at an event, with a wall of stacked boxes behind them
  • Two boys at a table working on a project with its instruction card
  • A boy at a table smiling beside a bottle with blue foam pouring out of it
  • Children in a room building a large dome out of colourful straws and connectors
  • A group of children around a table doing projects with an adult helping
  • A smiling girl resting her chin on her hands behind a dinosaur diorama she made

Every monthly box includes...

A sample of one of our boxes.

  1. A STEM Discovery Box with a built solar system model, bouncy balls, paints and engineering straws laid out around it

    Three activities

    Three activities per box, each on a different science topic.

  2. A graphic headed "All supplies included!" showing three panels of pre-portioned supplies: paint, model, brush and sandpaper; polymer crystals, mold and cup; and 75 straws with 75 connectors

    Nothing extra to buy

    No extra trip to the store.

  3. Three printed STEM Discovery Boxes lesson cards fanned on a wooden table, each showing photo instructions and the science behind a project

    Science lessons

    Step-by-step photo instructions along with age-appropriate educational science lessons.

  4. A YouTube video still showing a presenter demonstrating a glow-in-the-dark STEM Discovery Boxes project

    Video lessons

    Explore your projects with instructional videos by k-8 teacher Mike R. @ThatSTEMGuy, and viral YouTuber Jake Makes.

Parents' Choice Approved, 2019

Parents' Choice Approved, 2019

Low-risk to try

  • Cancel anytime
  • Free shipping every plan
  • Batteries included, nothing to shop for
  • 3 complete projects + 3 lessons per box

Family questions

How many projects come in each box?

Three complete projects plus three science lessons every month, each project with its own pre-portioned supplies. Most subscription boxes ship a single activity. You get three, which means more science per box for the same money.

What ages are the family kits for?

Kids ages 5 to 12+. Projects are matched to age tier, so a 6-year-old and an 11-year-old each get experiments suited to their level. Pick the age range that fits your child when you subscribe.

I have more than one kid. Do I need more than one box?

Each subscription is one box a month, matched to a single age tier. Two kids in the same tier can share one box, or add a second subscription so each child gets their own. Kids in different tiers (ages 5 to 7 and 7 to 12+) do best with a box for each, since projects are matched to their level.

Is it a good gift?

Yes. A subscription arrives every month as a new box of three complete projects, so the gift keeps giving. Choose a 3, 6, 9, or 12-month term, and it arrives fully stocked from the first box.

Will my kid need my help?

Kids ages 7 and up can follow the step cards on their own. For ages 5 to 7, projects are built for a little grown-up help, never a lot. Each build flags any step where an adult should assist.

Can I pause, skip, or cancel?

Yes. Pause, skip a month, or cancel anytime from your account. There is no lock-in and no cancellation fee.

Are the projects safe?

Projects use kid-safe materials and clear instructions. Supplies are pre-portioned, and each build lists any step where a grown-up should help.

Buying as a gift? A subscription arrives every month, ready to open. See gift options

Give your child three new projects this month

Nothing to buy separately. Free shipping. Cancel anytime.

Choose Your Subscription
Choose Your Subscription