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Grow curiosity.
Build confidence.

Most kids’ content is built to keep them watching. Marble is built to keep them curious. Your child spends time making, asking, guessing wrong and trying again, and comes out the other side a little more sure of themselves.

Supported by world-class advisors and researchers from:

Stanford Graduate School of Education MIT University of California, Irvine DeepMind
Sign-up today

Welcome to
Marble.

  1. 01

    You set the stage

    It starts with you. You answer a few quick questions about where your child is today and what sparks their curiosity, so the very first session already fits.

    Onboarding

    What sparks Mia’s curiosity?

    🦕 Dinosaurs
    🚀 Space
    ✏️ Drawing
    🐾 Animals
    🎵 Music
    🧱 Building
    📖 Stories
    🔭 Science
    Continue
  2. 02

    Your child explores

    They step into a living world and just play, exploring, making, asking, getting it wrong, trying again. Learning, without it ever feeling like school.

    See what kids can do inside Marble
  3. 03

    Marble follows their curiosity

    Behind the scenes, Marble maps what they know, and the world adapts to them. Each session leans further into what they’re curious about, aiming the next step just past what they’ve already mastered.

    Following her curiosity
  4. 04

    You stay in the loop

    Every day you get a window into how their curiosity is growing, plus simple ways to keep it going together in real life.

100 kids apps
in one game

Your child describes or sketches their idea, gets a blueprint to iterate on, then picks the resources and tools they think the job needs. The rules are realistic: a steel blade needs a forge, bread needs an oven, and working that out is the game.

Kids play.
Marble works.

Your child just plays and follows their curiosity. Marble handles the learning, catching the right moment to teach something real, without it ever feeling like school.

One thing they already know can unlock a whole stack they’re ready for. Answer a few questions and watch Marble map it out.

demo

Answer three questions about a child and watch a reading and maths skill map fill in.

Can they read simple words like “cat” and “dog”?
Can they add two-digit numbers, like 24 + 35?
Do they get that ½ is bigger than ¼?
Reading and maths skill mapTwo topic ladders of skills that light up as questions are answered. EarlierLater Letter soundsBlendingReading wordsSentencesShort storiesComprehensionCount to 20Adding upDouble-digitTimes tablesHalves, quartersFractions ReadingMaths
Got it Where Marble starts Coming up
ReadingUp next: Sentences
MathsUp next: Double-digit
WritingUp next: Spelling

Marble keeps a live map of what your child knows across every subject, so each session lands right where they’re ready to grow.

Mastered Marble works next Coming up

One child. One connected map.

Marble holds your child's whole curriculum as one connected map: 1,590 concepts joined by 3,221 prerequisite links, each one saying what has to come first. After every session it works at their growing edge, the next skill they're ready for once its foundations are secure, what learning scientists call the zone of proximal development.

An example child's path, shown from age 6 onward. Some foundations begin earlier.

Click a highlighted dot to see what it builds on and unlocks

We built the map from the US and UK curriculums and made it open source. Explore the whole thing.

Sign-up today
“Vivian loved it and I struggled to get her off the app, she enjoyed the interactions. (…) As a parent, it’s a better alternative to watching tv even though we try to reduce screen time and use books etc.”

Christina, mum of Vivian (10)

“My daughter was engaged because it interacted with her. It also required her to not stare at the screen the whole time”

Nick, dad of Camilla (6)

“It definitely invokes curiosity in my daughter! She is working on the Future Cities project, and conversations with Marble helped her make her thoughts clear!”

Mansi, mum of Nina (11)

“We enjoyed the interactive element the most and it was really cool that Marble could respond to what the boys liked/their ideas and then created new games to match.”

Matt, dad of Franck and Tim (5 and 7)

“Infinite ways to learn”

Leo, dad of Jason (6)

“Personalized learning with tangible educational progress that is the most fun kids have had in a long time”

Dona, mum of Iris (7)

“Better and safer than online games”

Nicole, mum of Sunny (7)

“I would absolutely pay for it, especially after seeing my kids light up sharing and bonding over the app together.”

Megan, mum of three (7, 11 and 12)

“She talks about her art constantly at home, and as a person who lacks all artistic ability, I was curious whether Marble could actually keep up with her. It did.”

Claire, mum of Elsie (7)

Join the
Marble
Pioneers.

Marble is still early, and we’re opening just a few hundred spots, for families who want more than passive screen time.

Early access

The full Marble world, free while we’re in beta.

First looks

Every new adventure and feature reaches you before anyone else.

Shape Marble

Your family’s feedback steers what we build next.

Got a wildly curious kid aged 6 to 12? Come build it with us.

Connect with Raju Holdings

We are assembling a group of parents, teachers, engineers, designers, and artists who believe childhood deserves better technology.

Not louder. Not stickier. Better.

Dream Team.

The Marble team

Tap a dot to meet each of us.

Lionel Cofounder CEO

Raised in a family of teachers between Austria, France and Italy. Spent the past decade building and launching products at the intersection of deep tech and consumers. Creative technologist, (very) average surfer.

Our principles.

Curiosity over clicks

We don't design to keep kids quiet or endlessly occupied.

Safety first

Not one filter, but many, working independently, mildly paranoid on your behalf.

AI isn't the boss

We use AI to guide exploration, not replace parents, teachers, or good judgement.

Made with care

Kids can tell when something wasn't really made for them. So can you.

Childhood is a brief and brilliant kind of magic.

A time to ask endless questions, chase ideas, and meet the world with an explorer's spirit.

It should be brave, safe, full of wonder, and maybe a little mischief.

But not all technology treats childhood that way.

Too often, screens distract rather than inspire, keep kids quiet instead of curious, fill time instead of nourishing it. As parents, we're forced to choose between convenience and quality.

We deserve better. Our kids deserve better.

That's why we're building a world for characters that are always ready for the next "Why?", where screen time is meaningful, never mindless.

This is tech worthy of childhood.

Learning kids will love, and grown-ups can trust.

This is Marble.

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