SIMULATE/ Simulator
SimulatorRobotPhysics
Simulation
Environment
Gravity: 3.71 m/s²
Physics that tells the truth.
Switch to the Moon or Zero-G and press Start. Gravity, mass and torque decide how your robot moves.
That robot in your head?
Build it here.
Give it legs. Give it wheels. Give it sensors.
Design, wire and code your robot in 3D.
Drag to rotate. Click to take it apart.Tap to take it apart.
All you need to build, in one place.
Shape the body, connect the electronics and write the code. Then hit Run and see your robot move.
01 / CAD
Build it.
Sketch the chassis, drop in motors and wheels, and snap them together on a real 3D workbench. Every part is measured, so what you build here is what you'd build on your desk.
Quick Tools
MoveWRotateEScaleR
SurfaceExtrudeSlice
SnapRot snapGuidesGridAxes
Objects snap to the grid
Features
Why builders choose Constructa.
Don't take our word for it. Every card below is a tiny piece of Constructa. Hover to play it again.
Typical starter kit
Servo motors ×4₹1,200
Arduino Uno₹750
Ultrasonic + IR sensors₹350
Chassis + wheels₹900
Battery, wires, breadboard₹800
Total₹4,000
₹0No parts to buy.
Test every idea for free. Build the real robot only when it works.
Sensor connected · 24 cm
Wiring you can see.
Drag a wire pin to pin. Sensors only work once they're wired right.
when startedrepeat foreverservo pin 9 → 90°wait 500 ms
→void loop() {servo.write(90);delay(500);}
Blocks become real code.
Snap blocks together and get real Arduino C++, ready for a real board.
Box · 11.02 × 2 × 2
A blank canvas, not a kit.
Shape any part with real CAD tools: slice, combine, extrude, all to exact size.
constructa.atumx.in
ConstructaUntitled robotSave
Workshop ready
Runs on your laptop.
Open a browser and start building. Nothing to install, nothing to pay.
Constructathon · 12 Sept 2026
Our last Constructathon, in pictures.
Our first build challenge. No templates and no limits: builders designed, wired and coded any robot they wanted, in a single day.
What's new
Constructa keeps getting better.
Every update ships free, straight to your browser. Here's what's coming next.
v2.0Dec 2026Coming soon
Robot Battles
Build a fighter, code its moves, then battle your friends' robots in the arena.
Same real physics. Last robot standing wins.
Get notified
Dec 2026
FAQ
Questions, answered.
Yes, completely free. We’re a hardware company, and the tool is how we say thanks to the maker community.
Nope. It runs right in your browser: Chrome, Edge, Firefox or Safari. Just use a computer, because Constructa needs a big screen to build big robots.
Constructa is built for a desktop-size screen, so it isn’t playable on a phone yet. Drop your email and we’ll send you a link to open your workshop on a computer.
Any robot you imagine. Wheels, legs, arms, sensors, motors. Free-form 3D building, not pre-built templates. If you can dream it, you can build it.
Two. Block Coding for beginners and real Arduino C++ when you're ready. The blocks write the C++ for you, so you can switch any time and see exactly what your blocks do.
Constructa is free to jump into right now. Drop your email too and we’ll send every new feature, release and tip straight to your inbox. If you described a robot you’d build, we might build it and feature you.
A robotics hardware startup based in Chennai, India. Making STEM kits since 2022, used in 500+ schools across four countries. SUBO is our flagship board; Constructa is our workshop in the browser.
Start building
Ready to build
something weird?
Jump into the workshop now, or drop your email to get every update. Free, no login.
Try Constructa freeFree · Sign up in seconds · Save your robotsOpen the workshop on a desktop or laptop. Constructa needs a big screen.
or get updates
New features, releases and tips go straight to this email. No spam.
Join the Discord community