Kids · 5 to 11
Build anything from shapes
Snap boxes, balls and stars together, add your name, pick your colours — then print it.
- 80 examples to open and change
- 17 practice games
- Big buttons, easy words
Free 3D design for ages 5 and up
Build in 3D. Hold it in your hand!
Snap shapes together on screen, then print your idea for real.
- No sign-up
- No download
- Works on tablets
Rocket: 6 shapes
Open in Kids 3D Lab →
For every young maker
Easy at 5. Still exciting at 15.
One free app that grows with your child — from first shapes to exact, real-world designs.
Teens · 12 to 17
Exact sizes and real CAD tools
Switch on Pro mode for measurement lines, sizes to 0.01 mm, patterns and boolean tools.
- Repeat, mirror, combine, overlap
- Help for GCSE DT and science fairs
- A first step to Fusion and Onshape
Parents and teachers
Free, safe and ready for class
Real maths and design skills, with no accounts, no adverts and nothing uploaded.
- Lesson plans for grades 3 to 5
- Works on Chromebooks and tablets
- A guide to every button
How it works
From an idea to a real thing in three steps
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1
Pick shapes
Click a box, a ball, a star or 28 more. Each one lands on the build plate, ready to use.
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2
Make it yours
Drag to move, stretch and turn. Stack shapes, cut holes, add your name, and pick your colours.
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3
Print it
Kids 3D Lab checks your model is ready, then saves a file your 3D printer understands.
Features
Everything a young maker needs — and nothing they don't
31 friendly shapes
Boxes, balls, stars, hearts, gears and more, in real millimetres.
Holes that really cut
Any shape can cut a hole. Make cups, key tags and windows.
Draw your own shape
Draw on a grid, and Kids 3D Lab makes it 3D.
Easy handles
Drag to move, resize and turn. Line up and stack with one click.
Print it, share it
A friendly check, then STL, 3MF or a picture.
See it every way
Flat views, X-ray, Layers and tabs for many builds.
Private by design
No account, no adverts. Builds stay on your computer.
Learning built in
A tour, a kids' tutorial, a guide and project ideas.
Try it here
Play with real 3D, right on this page
Try it here
Turn any shape into a hole
In Kids 3D Lab, any shape can be a hole. A hole cuts its own shape out of everything it touches — that's how you make cups, key tags, windows and cookie cutters.
1. Make it a…
2. Pick its shape
Press Hole to turn the cylinder into a hole.
Drag to spin
Try it here
Line things up
Pick the shape that stays put. Press a button, and the others slide over to line up with it — by their left sides, their middles, their backs and more. It works just the same in Kids 3D Lab.
1. Which one stays put?
2. Line the others up with it
3. Start again
The box stays put. Now press a button to line the others up with it.
Drag to spin
Stays put
Try it here
Stretch it
Make any shape wider, deeper or taller. A ball can become an egg or a pancake; a box, a brick or a tower. Every size is in real millimetres, just like in Kids 3D Lab.
1. Pick a shape
2. Stretch it
3. Or try one of these
Slide the bars to stretch the ball — or press Egg, Pancake or Sausage.
Drag to spin
Examples
80 ready-made builds to open, take apart and change
Every example is made from simple shapes, so you can see exactly how it works — then make it your own. Drag one to turn it round yourself.
For parents and teachers
A calm first step into design, maths and making
Simple without being a toy: every size is a real measurement, and what children design can really be printed.
Measuring and numbersMillimetres, sizes and angles, used for real.
Shapes and spaceTurning, flipping, stacking and fitting parts.
Planning and fixingBreaking a big idea into parts, and solving problems.
Safe to useNo accounts, no chat, no adverts, nothing uploaded.
Learn
Help whenever you need it
Tutorial
Ten short lessons and two projects. Perfect for your very first time.
The Guide
Every button and trick, in easy words, all on one page.
Practice corner
Hands-on 3D games: move, measure, draw, match, look inside and build on every side.
The Blog
20 easy lessons and projects, like a name keychain, a toy car or a cookie cutter.
Questions
Good to know
Is Kids 3D Lab free?
Yes. Kids 3D Lab is free to use, with no adverts and no paid extras.
Do I need an account?
No. Open the app and start building. There is nothing to sign up for and nothing to install.
Where are my builds kept?
On your own computer: in your browser (so a refresh never loses them), and in .kids3d files you save. Nothing is uploaded. Read our privacy page.
Which 3D printers work with Kids 3D Lab?
Any printer. Kids 3D Lab exports STL files, which every slicer opens (Cura, PrusaSlicer, Bambu Studio and more), and 3MF files that keep your colours for multi-colour printers.
What age is it for?
From about 5 years old. Younger children love picking shapes, colours and examples with a grown-up beside them; from about 8 they can follow the tutorial on their own. Grown-ups who are new to 3D design like it too!
Does it work on a tablet or a Chromebook?
Yes. It runs in any modern web browser, on computers, tablets and phones. A mouse makes building easiest, but touch works too: one finger turns the view, two fingers zoom, and on a phone a shape's settings open in a sheet with big sliders to drag.
Can my child try it without opening the app?
Yes. The Practice corner has hands-on 3D games, right in the web page: moving, measuring, drawing, matching, looking from every side, X-ray, workplanes and more. Each one shows one idea in a minute or two, and can be opened in the app to keep building.
Is 3D printing safe for kids?
Designing is completely safe. Printing is safe when a grown-up runs the printer: the nozzle gets very hot, so keep hands out while it works, use PLA plastic, and keep the room airy. Read Is 3D Printing Safe for Kids?
What will you build today?
A name tag, a rocket, a crown for your cat… Start with an empty plate or one of 80 examples.
Start building — it's free